{"id":4596,"date":"2019-09-22T07:51:39","date_gmt":"2019-09-22T04:21:39","guid":{"rendered":"https:\/\/cfd-mrk.ir\/?page_id=4596"},"modified":"2019-09-22T08:22:21","modified_gmt":"2019-09-22T04:52:21","slug":"sas-and-des-turbulence-nodels","status":"publish","type":"page","link":"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/sas-and-des-turbulence-nodels\/","title":{"rendered":"SAS \u0648 DES\u061b \u0645\u062f\u0644\u200e\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" style=\"text-align:right\">\u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS \u0648 DES<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">SAS and DES; Turbulence Hybrid Models<\/h2>\n\n\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">SAS \u0648 DES \u0645\u062f\u0644\u200e\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc\u060c \u0645\u0647\u0645\u062a\u0631\u06cc\u0646\u200c\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc RANS-LES \u0628\u0647 \u0634\u0645\u0627\u0631 \u0645\u06cc\u200c\u0631\u0648\u0646\u062f. \u0627\u0644\u0628\u062a\u0647 \u062f\u0631 \u0627\u0628\u062a\u062f\u0627 \u0628\u0647 \u0646\u0638\u0631 \u0645\u06cc\u200c\u0631\u0633\u062f \u0645\u0641\u0627\u0647\u06cc\u0645 \u0645\u062a\u0648\u0633\u0637 \u06af\u06cc\u0631\u06cc \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u062f\u0631 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc <a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/rans-turbulence-models\/\"><span style=\"color: #3366ff;\"><strong>RANS<\/strong><\/span><\/a> \u0648 \u0641\u06cc\u0644\u062a\u0631\u06cc\u0646\u06af \u0641\u0627\u0635\u0644\u0647\u200c\u0627\u06cc (Spatial Filtering) \u062f\u0631 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc <a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/les-turbulence-model\/\"><span style=\"color: #3366ff;\"><strong>LES<\/strong><\/span><\/a> \u0628\u0627 \u0647\u0645 \u0633\u0627\u0632\u06af\u0627\u0631 \u0646\u06cc\u0633\u062a\u0646\u062f. \u0686\u0631\u0627\u06a9\u0647 \u062a\u0631\u0645\u200c\u0647\u0627\u06cc \u0627\u0636\u0627\u0641\u06cc \u0645\u062a\u0641\u0627\u0648\u062a\u06cc \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u0645\u0646\u062a\u0645 (\u062a\u0646\u0634\u200c\u0647\u0627\u06cc \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u0648 \u062a\u0646\u0634\u200c\u0647\u0627\u06cc \u0632\u06cc\u0631 \u0634\u0628\u06a9\u0647) \u0631\u0627 \u0637\u0644\u0628 \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f. \u0627\u0632 \u0627\u06cc\u0646 \u0631\u0648 \u0628\u0627\u06cc\u062f \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc (\u0647\u06cc\u0628\u0631\u06cc\u062f\u06cc) \u0632\u06cc\u0631 \u06a9\u0647 \u0628\u0631\u0627\u0633\u0627\u0633 \u06cc\u06a9 \u062f\u0633\u062a\u0647 \u0627\u0632 \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u0645\u0646\u062a\u0645 \u0645\u062a\u0634\u06a9\u0644 \u0627\u0632 \u0628\u062e\u0634\u200c\u0647\u0627\u06cc LES \u0648 RANS \u062a\u0648\u0633\u0639\u0647 \u06cc\u0627\u0641\u062a\u0647\u200c\u0627\u0646\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u0648\u062f.&nbsp;<\/span><\/p>\n<ul>\n<li><strong><span style=\"color: #000000;\">Scale Adaptive Simulation: SAS<\/span><\/strong><\/li>\n<li><strong><span style=\"color: #000000;\">Detached Eddy Simulation: DES<\/span><\/strong><\/li>\n<li><strong><span style=\"color: #000000;\">Shield Detached Eddy Simulation: SDES<\/span><\/strong><\/li>\n<li><strong><span style=\"color: #000000;\">Stress-Blended Eddy Simulation: SBES<\/span><\/strong><\/li>\n<\/ul>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0632\u0645\u0627\u0646\u06cc\u06a9\u0647 \u06cc\u06a9 \u0645\u062f\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u0645\u0646\u062a\u0645 \u0646\u0627\u0648\u06cc\u0631\u0627\u0633\u062a\u0648\u06a9\u0633&nbsp; (\u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u062a\u0631\u0645 \u0686\u0634\u0645\u0647) \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f \u062f\u06cc\u06af\u0631 \u062d\u0627\u0645\u0644 \u0647\u06cc\u0686 \u06af\u0648\u0646\u0647 \u0627\u0637\u0644\u0627\u0639\u0627\u062a\u06cc \u062f\u0631 \u0645\u0648\u0631\u062f \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u06cc\u0627\u0646\u06af\u06cc\u0646 \u0622\u0646\u200c\u0647\u0627 \u0646\u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0646\u06a9\u062a\u0647 \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647 \u0627\u06cc\u0646\u06a9\u0647 \u0645\u062a\u062f\u0627\u0648\u0644\u200c\u062a\u0631\u06cc\u0646 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc\u060c \u0647\u0645 RANS \u0648 \u0647\u0645 LES\u060c \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0644\u0632\u062c\u062a \u0622\u0634\u0641\u062a\u06af\u06cc (\u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0627\u06cc) \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646 \u062a\u0646\u0634\u200c\u0647\u0627\u06cc \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u06cc\u0627 \u062a\u0646\u0634\u200c\u0647\u0627\u06cc \u0632\u06cc\u0631 \u0634\u0628\u06a9\u0647 \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u06cc\u0627\u0646\u06af\u06cc\u0646 \u06af\u06cc\u0631\u06cc \u0634\u062f\u0647 RANS \u06cc\u0627 \u0641\u06cc\u0644\u062a\u0631 \u0634\u062f\u0647 LES \u0645\u06cc\u200c\u0634\u0648\u0646\u062f. \u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 \u067e\u0633 \u0627\u0632 \u062a\u0639\u0631\u06cc\u0641 \u0644\u0632\u062c\u062a \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0627\u06cc (\u0644\u0632\u062c\u062a \u0622\u0634\u0641\u062a\u06af\u06cc) \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u0645\u0646\u062a\u0645 RANS \u0648 LES \u0631\u0633\u0645\u0627 \u06cc\u06a9\u0633\u0627\u0646 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f \u0628\u0627 \u0627\u06cc\u0646 \u062a\u0641\u0627\u0648\u062a \u06a9\u0647 \u0645\u062d\u0627\u0633\u0628\u0647 \u0644\u0632\u062c\u062a \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0627\u06cc \u062a\u0648\u0633\u0637 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0645\u062e\u062a\u0644\u0641\u06cc \u0635\u0648\u0631\u062a \u0645\u06cc\u200c\u067e\u0630\u06cc\u0631\u062f. \u0627\u06cc\u0646 \u0642\u0627\u0628\u0644\u06cc\u062a \u0628\u0647 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0627\u06cc\u0646 \u0627\u062c\u0627\u0632\u0647 \u0631\u0627 \u0645\u06cc\u200c\u062f\u0647\u062f \u062a\u0627 \u0628\u06cc\u0646 \u0645\u0648\u062f\u0647\u0627\u06cc RANS \u0648 LES \u0633\u0648\u0626\u06cc\u0686 \u06a9\u0646\u062f \u0628\u062f\u0648\u0646 \u0622\u0646\u06a9\u0647 \u0628\u0647 \u062a\u063a\u06cc\u06cc\u0631\u06cc \u062f\u0631 \u0633\u0627\u062e\u062a\u0627\u0631 \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u0645\u0646\u062a\u0645 \u0645\u0646\u062c\u0631 \u0634\u0648\u062f. \u062f\u0631 \u0648\u0627\u0642\u0639 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc SAS \u0648 DES \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0645\u062c\u0647\u0632 \u0628\u0647 \u0645\u0648\u062f\u0647\u0627\u06cc RANS \u0648 LES \u0647\u0633\u062a\u0646\u062f.<\/span><\/p>\n<p><\/p>\n<h2 style=\"text-align: right;\"><strong><span style=\"color: #800000;\">\u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc Scale-Adaptive Simulation: SAS<\/span><\/strong><\/h2>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc \u0634\u0628\u06cc \u0633\u0627\u0632\u06cc \u062a\u0637\u0628\u06cc\u0642 \u0645\u0642\u06cc\u0627\u0633 (Scale-Adaptive Simulation: SAS) \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0628\u0647\u0628\u0648\u062f \u06cc\u0627\u0641\u062a\u0647\u200c\u0627\u06cc \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc Unsteady RANS: URANS \u0645\u06cc\u200c\u0628\u0627\u0634\u062f \u06a9\u0647 \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc\u200c\u062f\u0647\u062f \u0637\u06cc\u0641\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062f\u0631 \u062c\u0631\u06cc\u0627\u0646\u200c\u0647\u0627 \u0646\u0627\u067e\u0627\u06cc\u0627 \u0628\u0627 \u0648\u0636\u0648\u062d \u0628\u0633\u06cc\u0627\u0631 \u0628\u06cc\u0634\u062a\u0631\u06cc \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0634\u0648\u0646\u062f. \u0634\u06a9\u0644 \u0632\u06cc\u0631 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0628\u06cc\u0646 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u062c\u0631\u06cc\u0627\u0646 \u0639\u0628\u0648\u0631\u06cc \u0627\u0632 \u0631\u0648\u06cc \u06cc\u06a9 \u0633\u06cc\u0644\u0646\u062f\u0631 \u0628\u06cc\u0646 \u062f\u0648 \u0631\u0648\u0634 URANS-SST (\u062a\u0635\u0648\u06cc\u0631 \u0628\u0627\u0644\u0627) \u0648 \u0645\u062f\u0644 \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS-SST (\u062a\u0635\u0648\u06cc\u0631-\u067e\u0627\u06cc\u06cc\u0646) \u0631\u0627 \u0646\u0634\u0627\u0646 \u0645\u06cc\u200c\u062f\u0647\u062f. \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u062f\u0631 \u0627\u06cc\u0646 \u0634\u06a9\u0644 \u067e\u06cc\u062f\u0627\u0633\u062a\u060c \u062f\u0631 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0628\u0647 \u0631\u0648\u0634 URANS-SST \u062a\u0646\u0647\u0627 \u0645\u0642\u06cc\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0634\u062f\u0647\u200c\u0627\u0646\u062f \u062f\u0631 \u062d\u0627\u0644\u06cc\u06a9\u0647 \u062f\u0631 \u0631\u0648\u0634 SAS-SST \u0634\u0627\u0647\u062f \u0646\u0645\u0627\u06cc\u0634 \u0637\u06cc\u0641\u200c\u0647\u0627\u06cc \u0648\u0633\u06cc\u0639\u06cc \u0627\u0632 \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0647\u0627 \u062f\u0631 \u0646\u0648\u0627\u062d\u06cc \u062c\u062f\u0627\u06cc\u0634 \u062c\u0631\u06cc\u0627\u0646 \u0647\u0633\u062a\u06cc\u0645.&nbsp;<\/span><\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-simulation.png\" alt=\"\u0645\u0642\u0627\u06cc\u0633\u0647 \u0628\u06cc\u0646 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u062c\u0631\u06cc\u0627\u0646 \u0639\u0628\u0648\u0631\u06cc \u0627\u0632 \u0631\u0648\u06cc \u06cc\u06a9 \u0633\u06cc\u0644\u0646\u062f\u0631 \u0628\u06cc\u0646 \u062f\u0648 \u0631\u0648\u0634 URANS-SST (\u062a\u0635\u0648\u06cc\u0631 \u0628\u0627\u0644\u0627) \u0648 \u0645\u062f\u0644 \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS-SST (\u062a\u0635\u0648\u06cc\u0631-\u067e\u0627\u06cc\u06cc\u0646)\" class=\"wp-image-4611\" width=\"442\" height=\"497\" srcset=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-simulation.png 288w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-simulation-266x300.png 266w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-simulation-239x270.png 239w\" sizes=\"auto, (max-width: 442px) 100vw, 442px\" \/><figcaption> <a href=\"https:\/\/www.ansys.com\/products\/fluids\/ansys-fluent\">\u0645\u0642\u0627\u06cc\u0633\u0647 \u0628\u06cc\u0646 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u062c\u0631\u06cc\u0627\u0646 \u0639\u0628\u0648\u0631\u06cc \u0627\u0632 \u0631\u0648\u06cc \u06cc\u06a9 \u0633\u06cc\u0644\u0646\u062f\u0631 \u0628\u06cc\u0646 \u062f\u0648 \u0631\u0648\u0634 URANS-SST (\u062a\u0635\u0648\u06cc\u0631 \u0628\u0627\u0644\u0627) \u0648 \u0645\u062f\u0644 \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS-SST (\u062a\u0635\u0648\u06cc\u0631-\u067e\u0627\u06cc\u06cc\u0646) <\/a><\/figcaption><\/figure><\/div>\n\n\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u062f\u0631 \u0648\u0627\u0642\u0639 \u0645\u0641\u0647\u0648\u0645 SAS \u0628\u0631\u0627\u0633\u0627\u0633 \u062a\u0639\u0631\u06cc\u0641 \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 (Length-Scale) \u0648\u0646 \u06a9\u0627\u0631\u0645\u0646 (von K\u00e1rm\u00e1n )&nbsp; \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0647 \u0645\u0642\u06cc\u0627\u0633 \u0622\u0634\u0641\u062a\u06af\u06cc \u0628\u06cc\u0627\u0646 \u0634\u062f\u0647 \u0627\u0633\u062a. \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0648\u0646 \u06a9\u0627\u0631\u0645\u0646 \u0628\u0647 \u0645\u062f\u0644 SAS \u0627\u062c\u0627\u0632\u0647 \u0645\u06cc\u200c\u062f\u0647\u062f \u06a9\u0647 \u0628\u0635\u0648\u0631\u062a \u062f\u06cc\u0646\u0627\u0645\u06cc\u06a9\u06cc \u0633\u0627\u062e\u062a\u0627\u0631 \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0647\u0627 \u0631\u0627 \u062f\u0631 RANS \u062a\u0646\u0638\u06cc\u0645 \u06a9\u0646\u062f. \u062d\u0644 \u0645\u0633\u0626\u0644\u0647 \u0628\u0627 \u0627\u06cc\u0646 \u0631\u0648\u0634 \u0631\u0641\u062a\u0627\u0631\u06cc LES \u0645\u0627\u0646\u0646\u062f \u062f\u0631 \u0646\u0648\u0627\u062d\u06cc \u0645\u06cc\u062f\u0627\u0646 \u062c\u0631\u06cc\u0627\u0646 \u0631\u0627 \u0646\u062a\u06cc\u062c\u0647 \u0645\u06cc\u200c\u062f\u0647\u062f. \u062f\u0631 \u0639\u06cc\u0646 \u062d\u0627\u0644 \u0646\u06cc\u0632 \u062a\u0648\u0627\u0646\u0645\u0646\u062f\u06cc\u200c\u0647\u0627\u06cc \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f RANS \u062f\u0631 \u0646\u0648\u0627\u062d\u06cc \u062c\u0631\u06cc\u0627\u0646 \u067e\u0627\u06cc\u062f\u0627\u0631 \u0631\u0627 \u0646\u06cc\u0632 \u0634\u0627\u0645\u0644 \u0645\u06cc\u200c\u0634\u0648\u062f.&nbsp;<\/span><\/p>\n<p><\/p>\n<h3 style=\"text-align: right;\"><span style=\"color: #ff0000;\"><strong>\u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0627\u0646\u062a\u0642\u0627\u0644 \u0628\u0631\u0627\u06cc \u0645\u062f\u0644 SAT-SST<\/strong><\/span><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0627\u0632 \u06cc\u06a9 \u062f\u06cc\u062f\u06af\u0627\u0647 \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645\u060c \u062a\u0645\u0627\u0645\u06cc \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u062f\u0648 \u0645\u0639\u0627\u062f\u0644\u0647\u200c\u0627\u06cc \u0645\u0648\u062c\u0648\u062f \u0627\u0632 \u0641\u0642\u062f\u0627\u0646 \u06cc\u06a9 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u062f\u0642\u06cc\u0642 \u0648 \u0632\u06cc\u0631\u0628\u0646\u0627\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0645\u062f\u0644\u0633\u0627\u0632\u06cc \u062f\u0642\u06cc\u0642 \u062a\u0631\u0645 \u0628\u0647 \u062a\u0631\u0645 \u0631\u0646\u062c \u0645\u06cc\u200c\u0628\u0631\u0646\u062f. \u0639\u0644\u062a \u0627\u06cc\u0646 \u0636\u0639\u0641 \u0622\u0646\u0633\u062a \u06a9\u0647 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u03b5 \u0645\u0642\u06cc\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u0628\u062c\u0632 \u0645\u0642\u06cc\u0627\u0633\u200c\u0647\u0627\u06cc \u0627\u062a\u0633\u0627\u0639 (Dissipative Scale) \u0631\u0627 \u0646\u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u062a\u0648\u0635\u06cc\u0641 \u06a9\u0646\u062f. \u0628\u0647 \u0647\u0631 \u0635\u0648\u0631\u062a \u0647\u062f\u0641 \u0627\u0632 \u062a\u0648\u0633\u0639\u0647 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u062f\u0648 \u0645\u0639\u0627\u062f\u0644\u0647\u200c\u0627\u06cc\u060c \u0645\u062f\u0644\u0633\u0627\u0632\u06cc \u062a\u0623\u062b\u06cc\u0631 \u062d\u0631\u06a9\u0627\u062a \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u0631\u0648\u06cc \u062c\u0631\u06cc\u0627\u0646 \u0645\u062a\u0648\u0633\u0637 \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0628\u0647 \u062f\u0644\u06cc\u0644 \u0646\u0628\u0648\u062f \u06cc\u06a9 \u0645\u0639\u0627\u062f\u0644\u0647 \u062f\u0642\u06cc\u0642\u060c \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u03b5 \u0648 \u03c9 \u0628\u0637\u0648\u0631 \u0645\u0634\u0627\u0628\u0647 \u0648 \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u0631\u0698\u06cc \u062c\u0646\u0628\u0634\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc\u060c k\u060c \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0631\u06af\u0648\u0645\u0627\u0646\u200c\u0647\u0627\u06cc \u0635\u0631\u0641\u0627 \u0627\u0628\u062a\u06a9\u0627\u0631\u06cc \u0648 \u0627\u06a9\u062a\u0634\u0627\u0641\u06cc \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0645\u06cc\u200c\u0634\u0648\u0646\u062f.<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u062a\u0642\u0631\u06cc\u0628 \u0645\u0646\u0633\u062c\u0645\u200c \u0648 \u0628\u0627 \u062b\u0628\u0627\u062a\u06cc \u0628\u0631\u0627\u06cc \u0641\u0631\u0645\u0648\u0644\u0647 \u06a9\u0631\u062f\u0646 \u0645\u0639\u0627\u062f\u0644\u0647 \u0645\u0642\u06cc\u0627\u0633 \u062a\u0648\u0633\u0637 \u0631\u0648\u062a\u0627 (Rotta) \u0627\u0631\u0627\u0626\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. \u0628\u062c\u0627\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0631\u06af\u0648\u0645\u0627\u0646\u200c\u0647\u0627\u06cc \u0627\u0628\u0639\u0627\u062f\u06cc \u0648 \u0627\u0628\u062a\u06a9\u0627\u0631\u06cc\u060c \u0631\u0648\u062a\u0627 \u06cc\u06a9 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u0628\u0631\u0627\u06cc \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0648 \u0627\u0646\u0631\u0698\u06cc \u062c\u0646\u0628\u0634\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0628\u0647 \u062f\u0633\u062a \u0622\u0648\u0631\u062f. \u062f\u0631 \u062d\u0642\u06cc\u0642\u062a \u0645\u0639\u0627\u062f\u0644\u0647 \u0631\u0648\u062a\u0627 \u0628\u06cc\u0627\u0646\u06af\u0631 \u0645\u0642\u06cc\u0627\u0633\u200c\u0647\u0627\u06cc \u0628\u0632\u0631\u06af \u0622\u0634\u0641\u062a\u06af\u06cc \u0628\u0648\u062f\u0647 \u0648 \u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u062a\u0631\u0645 \u0628\u0647 \u062a\u0631\u0645 \u0645\u062f\u0644\u0633\u0627\u0632\u06cc \u0631\u0627 \u0628\u0627 \u062f\u0642\u062a \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u062f. \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0627\u0646\u062a\u0642\u0627\u0644 \u0645\u062f\u0644 SAS-SST \u0628\u06a9\u0627\u0631 \u0631\u0641\u062a\u0647 \u062f\u0631 Fluent \u0628\u0631\u0627\u0633\u0627\u0633 \u0631\u0648\u0634 \u0631\u0648\u062a\u0627 \u0628\u0631\u0627\u06cc K-\u03c9 SST&nbsp; \u0648 \u0628\u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u0645\u062d\u0627\u0633\u0628\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f.<\/span>&nbsp;<\/p>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"647\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-sst-formulation.png\" alt=\"\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0645\u062f\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc \u0627\u0646\u062a\u0642\u0627\u0644\u06cc SAS-SST.\" class=\"wp-image-4649\" srcset=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-sst-formulation.png 960w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-sst-formulation-300x202.png 300w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-sst-formulation-768x518.png 768w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/SAS-sst-formulation-360x243.png 360w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><figcaption> \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0645\u062f\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc \u0627\u0646\u062a\u0642\u0627\u0644\u06cc SAS-SST. <\/figcaption><\/figure>\n\n\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u062f\u0631 \u0628\u0627\u0644\u0627 \u067e\u06cc\u062f\u0627\u0633\u062a\u060c \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0645\u062f\u0644 SAS-SST \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u062f\u0631 \u0628\u0627\u0644\u0627 \u062a\u0646\u0647\u0627 \u0628\u0647 \u062e\u0627\u0637\u0631 \u0627\u0636\u0627\u0641\u0647 \u0634\u062f\u0646 \u062a\u0631\u0645 <b>Q_<\/b>SAS \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u0641\u0631\u06a9\u0627\u0646\u0633 \u06af\u0631\u062f\u0627\u0628\u0647\u060c \u03c9\u060c \u0628\u0627 \u0645\u0639\u0627\u062f\u0644\u0627\u062a RANS-SST \u062a\u0641\u0627\u0648\u062a \u062f\u0627\u0631\u062f. \u0647\u0645\u0686\u0646\u06cc\u0646 \u067e\u0627\u0631\u0627\u0645\u062a\u0631\u0647\u0627\u06cc <strong>\u03c3<\/strong>\u03c9 \u0648 <strong>\u03c3<\/strong>\u03c92 \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u03c9\u060c \u0645\u0642\u0627\u062f\u06cc\u0631 \u0645\u0631\u062a\u0628\u0637 \u0628\u0627 \u0631\u0698\u06cc\u0645 K-\u03b5 \u062f\u0631 \u0645\u062f\u0644 SST \u0645\u06cc\u200c\u0628\u0627\u0634\u0646\u062f. \u0631\u0627\u0628\u0637\u0647 <b>Q_<\/b>SAS \u0646\u06cc\u0632 \u062f\u0631 \u0628\u0627\u0644\u0627 \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. \u062f\u0631 \u0648\u0627\u0642\u0639 \u0627\u06cc\u0646 \u062a\u0631\u0645 \u0686\u0634\u0645\u0647 \u0627\u0632 \u062a\u0631\u0645 \u0645\u0634\u062a\u0642 \u0645\u0631\u062a\u0628\u0647 \u062f\u0648\u0645 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u0631\u0648\u062a\u0627 \u0633\u0631\u0686\u0634\u0645\u0647 \u0645\u06cc\u200c\u06af\u06cc\u0631\u062f. \u0645\u0642\u0627\u062f\u06cc\u0631 \u062b\u0627\u0628\u062a\u200c\u0647\u0627 \u0646\u06cc\u0632 \u062f\u0631 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0628\u0627\u0644\u0627 \u062f\u0631\u062c \u0634\u062f\u0647 \u0627\u0633\u062a. \u0631\u0648\u0627\u0628\u0637 \u0645\u0639\u0631\u0641 <strong>L<\/strong>\u060c \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0648 <strong>L<\/strong>vk\u060c \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0648\u0646 \u06a9\u0627\u0631\u0645\u0646 \u0646\u06cc\u0632 \u062f\u0631 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0641\u0648\u0642 \u0627\u0631\u0627\u0626\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. <\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u0634\u062a\u0642 \u0633\u0631\u0639\u062a u\u2202\/\u2202y \u062f\u0631 \u0631\u0627\u0628\u0637\u0647 <strong>L<\/strong>vk \u0628\u0635\u0648\u0631\u062a &#8216;U \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u0645\u0633\u0627\u0648\u06cc \u0628\u0627 <strong>S<\/strong>\u060c \u062b\u0627\u0628\u062a \u0627\u0633\u06a9\u0627\u0644\u0631 \u062a\u0627\u0646\u0633\u0648\u0631 \u0646\u0631\u062e \u06a9\u0631\u0646\u0634 \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647 \u0627\u0633\u062a \u06a9\u0647 \u0647\u0645\u0627\u0646 S \u0628\u0637\u0648\u0631 \u0645\u0633\u062a\u0642\u06cc\u0645 \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0627\u062a <strong>Q_<\/strong>SAS \u0648 \u062a\u0631\u0645 \u062a\u0648\u0644\u06cc\u062f \u0622\u0634\u0641\u062a\u06af\u06cc <strong>P<\/strong>k \u0646\u06cc\u0632 \u062d\u0636\u0648\u0631 \u062f\u0627\u0631\u062f. \u0645\u0634\u062a\u0642 \u062f\u0648\u0645 \u0633\u0631\u0639\u062a &#8220;U \u0628\u0631\u0627\u06cc \u0641\u0636\u0627\u06cc \u0633\u0647 \u0628\u0639\u062f\u06cc \u0648 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u0642\u062f\u0627\u0631 \u0644\u0627\u067e\u0644\u0627\u0633 \u0633\u0631\u0639\u062a \u0628\u062f\u0633\u062a \u0645\u06cc\u200c\u0622\u06cc\u062f. \u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 L \u0648 <strong>L<\/strong>vk \u062a\u0639\u0631\u06cc\u0641 \u0634\u062f\u0647 \u0647\u0631 \u062f\u0648 \u0628\u0631\u0627\u0628\u0631 (<strong>ky<\/strong>) \u062f\u0631 \u0628\u062e\u0634 \u0644\u06af\u0627\u0631\u06cc\u062a\u0645\u06cc \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0645\u06cc\u200c\u0628\u0627\u0634\u0646\u062f \u0648 <strong>K<\/strong>=0.41&nbsp; \u062b\u0627\u0628\u062a \u0648\u0646 \u06a9\u0627\u0631\u0645\u0646 \u0627\u0633\u062a. <\/span><span style=\"color: #000000; font-size: inherit;\">\u0645\u062f\u0644 \u0645\u0630\u06a9\u0648\u0631 \u0647\u0645\u0686\u0646\u06cc\u0646 \u06cc\u06a9 \u06a9\u0646\u062a\u0631\u0644 \u06a9\u0646\u0646\u062f\u0647 \u0645\u0633\u062a\u0642\u06cc\u0645 \u0645\u06cc\u0631\u0627\u06cc\u06cc \u0639\u062f\u062f \u0645\u0648\u062c \u0628\u0627\u0644\u0627 \u062f\u0627\u0631\u062f \u06a9\u0647 \u062f\u0631 \u0631\u0648\u0627\u0628\u0637 \u0641\u0648\u0642 \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. \u062f\u0631 \u0648\u0627\u0642\u0639 \u0627\u06cc\u0646 \u0645\u062d\u062f\u0648\u062f \u06a9\u0646\u0646\u062f\u0647 \u0645\u062a\u0646\u0627\u0633\u0628 \u0628\u0627 \u0627\u0646\u062f\u0627\u0632\u0647 \u0627\u0644\u0645\u0627\u0646 \u0634\u0628\u06a9\u0647\u060c \u0394\u060c \u0628\u0648\u062f\u0647 \u06a9\u0647 \u0628\u0635\u0648\u0631\u062a \u0631\u06cc\u0634\u0647 \u062f\u0648\u0645 \u0627\u0646\u062f\u0627\u0632\u0647 \u062d\u062c\u0645 \u06a9\u0646\u062a\u0631\u0644 <\/span><strong style=\"color: #000000; font-size: inherit;\">\u03a9_<\/strong><span style=\"color: #000000; font-size: inherit;\">CV \u0645\u062d\u0627\u0633\u0628\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0647\u062f\u0641 \u0627\u0632 \u0627\u06cc\u0646 \u0645\u062d\u062f\u0648\u062f \u06a9\u0646\u0646\u062f\u0647\u060c \u06a9\u0646\u062a\u0631\u0644 \u0645\u06cc\u0631\u0627\u06cc\u06cc \u0631\u06cc\u0632\u062a\u0631\u06cc\u0646 \u0646\u0648\u0633\u0627\u0646\u0627\u062a \u0622\u0634\u0641\u062a\u06af\u06cc \u0645\u06cc\u200c\u0628\u0627\u0634\u062f.&nbsp;<\/span><\/p>\n<p><\/p>\n<h3 style=\"text-align: right;\"><strong><span style=\"color: #ff0000;\">\u0645\u062f\u0644 \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS \u0647\u0645\u0631\u0627\u0647 \u0628\u0627 \u0633\u0627\u06cc\u0631 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u03c9 \u0645\u0628\u0646\u0627<\/span><\/strong><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0631\u0648\u0634 \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS \u0646\u0647 \u062a\u0646\u0647\u0627 \u0628\u0627 \u0645\u062f\u0644 SST \u0628\u0644\u06a9\u0647 \u0628\u0627 \u0686\u0646\u062f\u06cc\u0646 \u0645\u062f\u0644\u200c \u062f\u06cc\u06af\u0631 \u0622\u0634\u0641\u062a\u06af\u06cc \u03c9 \u0645\u0628\u0646\u0627 \u0646\u06cc\u0632 \u062a\u0631\u06a9\u06cc\u0628 \u0634\u0648\u062f \u06a9\u0647 \u0639\u0628\u0627\u0631\u062a\u0646\u062f \u0627\u0632:<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">1- \u0645\u062f\u0644\u200c\u0647\u0627\u06cc K-\u03c9 BSL \u060cK-\u03c9 Standard \u0648 \u0645\u062f\u0644 \u06af\u0630\u0631\u0627\u06cc SST.<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">2- \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0646\u0634 \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 (RSM) \u0645\u0628\u062a\u0646\u06cc \u0628\u0631 \u03c9.<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0628\u0627 \u0627\u0636\u0627\u0641\u0647 \u0646\u0645\u0648\u062f\u0646 \u062a\u0648\u0627\u0646\u0645\u0646\u062f\u06cc\u200c\u0647\u0627\u06cc SAS \u0628\u0647 \u06cc\u06a9\u06cc \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0641\u0648\u0642\u060c \u062a\u0631\u0645 \u0686\u0634\u0645\u0647 Q_SAS \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u03c9 \u0642\u0627\u0628\u0644 \u0645\u062d\u0627\u0633\u0628\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0627\u06af\u0631 \u0627\u06cc\u0646 \u0642\u0627\u0628\u0644\u06cc\u062a \u0628\u0627 \u0645\u062f\u0644 BSL \u062a\u0631\u06a9\u06cc\u0628 \u0634\u0648\u062f \u0622\u0646\u06af\u0627\u0647 \u0636\u0631\u0627\u06cc\u0628 \u03b1 \u0648 \u03b2 \u062f\u0631 \u0631\u0627\u0628\u0637\u0647 Lvx \u0645\u062d\u062f\u0648\u062f\u06af\u0631\u060c \u0647\u0645\u0627\u0646 \u0636\u0631\u0627\u0626\u0628 \u0645\u062f\u0644 K-\u03c9 BSL \u062e\u0648\u0627\u0647\u062f \u0628\u0648\u062f. \u0628\u0631\u0627\u06cc \u0633\u0627\u06cc\u0631 \u062a\u0631\u06a9\u06cc\u0628\u0627\u062a\u060c \u0636\u0631\u0627\u0626\u0628 \u0645\u062f\u0644 SST \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0642\u0631\u0627\u0631 \u0645\u06cc\u200c\u06af\u06cc\u0631\u062f. \u0628\u0639\u0644\u0627\u0648\u0647\u0627\u06cc\u0646 \u0636\u0631\u0627\u06cc\u0628 \u062f\u0631 \u062a\u0631\u0645 SAS\u060c \u0627\u062b\u0631\u0627\u062a \u062a\u0631\u0627\u06a9\u0645\u200c\u067e\u0630\u06cc\u0631\u06cc \u0631\u0627 \u0634\u0627\u0645\u0644 \u0646\u0645\u06cc\u200c\u0634\u0648\u0646\u062f.&nbsp;<\/span><\/p>\n<p><\/p>\n<h2 style=\"text-align: right;\"><span style=\"color: #800000;\"><strong>\u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc&nbsp; detached Eddy Simulation: DES<\/strong><\/span><\/h2>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u062f\u0631 \u0631\u0648\u0634 \u0634\u0628\u06cc\u0647\u200c\u0633\u0627\u0632\u06cc \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0647\u0627\u06cc \u062c\u062f\u0627 \u0634\u062f\u0647 (Detached Eddy Simulation: DES) \u0645\u062f\u0644\u200c\u0647\u0627\u06cc URANS \u0628\u0631\u0627\u06cc \u062d\u0644 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0628\u06a9\u0627\u0631 \u06af\u0631\u0641\u062a\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f \u062f\u0631 \u062d\u0627\u0644\u06cc\u06a9\u0647 \u0627\u0632 LES \u0628\u0645\u0646\u0638\u0648\u0631 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0646\u0648\u0627\u062c\u06cc \u062c\u062f\u0627\u06cc\u0634 \u062c\u0631\u06cc\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f. \u0645\u062f\u0644\u200c\u0647\u0627\u06cc RANS \u0645\u062a\u0639\u062f\u062f\u06cc \u0628\u0631\u0627\u06cc \u0631\u0648\u0634\u200c\u0647\u0627\u06cc DES \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u0646\u062f \u06a9\u0647 \u0627\u0632 \u062c\u0645\u0644\u0647 \u0622\u0646\u200c\u0647\u0627 \u0628\u0647 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a-\u0622\u0644\u0645\u0627\u0631\u0627\u0633\u060c K-\u03b5 Realizable. K-\u03c9 BSL\/SST \u0648 \u0645\u062f\u0644 \u06af\u0630\u0631\u0627\u06cc SST \u0627\u0634\u0627\u0631\u0647 \u0646\u0645\u0648\u062f. \u0646\u0627\u062d\u06cc\u0647 LES \u0645\u0639\u0645\u0648\u0644\u0627 \u0628\u0627 \u0647\u0633\u062a\u0647 \u0646\u0627\u062d\u06cc\u0647 \u0622\u0634\u0641\u062a\u0647 -\u062c\u0627\u0626\u06cc\u06a9\u0647 \u0645\u0642\u06cc\u0627\u0633\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0646\u0627\u067e\u0627\u06cc\u0627 \u0646\u0642\u0634 \u0645\u0647\u0645\u06cc \u0628\u0627\u0632\u06cc \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f-\u062f\u0631 \u0627\u0631\u062a\u0628\u0627\u0637 \u0647\u0633\u062a\u0646\u062f. \u062f\u0631 \u0627\u06cc\u0646 \u0646\u0648\u0627\u062d\u06cc \u0645\u062f\u0644\u200c\u0647\u0627\u06cc DES \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0632\u06cc\u0631\u0634\u0628\u06a9\u0647 LES \u0631\u0627 \u067e\u0648\u0634\u0634 \u0645\u06cc\u200c\u062f\u0647\u0646\u062f. \u062f\u0631 \u062d\u0627\u0644\u06cc\u06a9\u0647 \u062f\u0631 \u0646\u0648\u0627\u062d\u06cc \u0646\u0632\u062f\u06cc\u06a9 \u062f\u06cc\u0648\u0627\u0631\u0647 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc RANS \u0628\u06a9\u0627\u0631 \u06af\u0631\u0641\u062a\u0647 \u0634\u062f\u0647 \u067e\u0648\u0634\u0634 \u062f\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u0646\u062f.&nbsp;<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644\u200c\u0647\u0627\u06cc DES \u0627\u0633\u0627\u0633\u0627 \u0628\u0631\u0627\u06cc \u062c\u0631\u06cc\u0627\u0646\u200c\u0647\u0627\u06cc \u0645\u062d\u062f\u0648\u062f \u0628\u0647 \u062f\u06cc\u0648\u0627\u0631\u0647 (Wall-Bounded) \u0648 \u0628\u0627 \u0631\u06cc\u0646\u0648\u0644\u062f\u0632\u0647\u0627\u06cc \u0628\u0627\u0644\u0627 \u062a\u0648\u0633\u0639\u0647 \u06cc\u0627\u0641\u062a\u0647\u200c\u0627\u0646\u062f. \u0686\u0631\u0627\u06a9\u0647 \u0647\u0632\u06cc\u0646\u0647 (CPU \u0648 \u0632\u0645\u0627\u0646) \u062d\u0644 \u0645\u06cc\u062f\u0627\u0646\u062f \u062c\u0631\u06cc\u0627\u0646 \u0622\u0634\u0641\u062a\u0647 \u0646\u0632\u062f\u06cc\u06a9 \u0628\u0647 \u062f\u06cc\u0648\u0627\u0631\u0647 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc LES \u0628\u0633\u06cc\u0627\u0631 \u0632\u06cc\u0627\u062f \u0627\u0633\u062a. \u062a\u0641\u0627\u0648\u062a \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc DES \u0628\u0627 LES \u062a\u0646\u0647\u0627 \u062f\u0631 \u062d\u0644 \u0645\u06cc\u062f\u0627\u0646 \u062c\u0631\u06cc\u0627\u0646 \u0646\u0632\u062f\u06cc\u06a9 \u062f\u06cc\u0648\u0627\u0631\u0647 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc RANS \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0628\u0647 \u0647\u0631 \u0635\u0648\u0631\u062a \u0647\u0645\u0686\u0646\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc DES \u0645\u0633\u062a\u0644\u0632\u0645 \u0628\u0631\u062e\u0648\u0631\u062f\u0627\u0631\u06cc \u0627\u0632 \u067e\u0631\u062f\u0627\u0632\u0634\u06af\u0631\u0647\u0627\u06cc \u067e\u0631 \u0642\u062f\u0631\u062a \u0645\u062d\u0627\u0633\u0628\u0627\u062a\u06cc \u0627\u0633\u062a. \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0631\u0627\u0647\u0646\u0645\u0627\u06cc\u06cc \u06a9\u0644\u06cc \u067e\u06cc\u0634\u0646\u0647\u0627\u062f \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u0628\u0631\u0627\u06cc \u0627\u063a\u0644\u0628 \u0645\u0633\u0627\u0626\u0644 \u0645\u0647\u0646\u062f\u0633\u06cc \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc RANS \u0645\u062a\u062f\u0627\u0648\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0634\u0648\u062f.<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644\u200c\u0647\u0627\u06cc DES\u060c \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc LES\/RANS \u0631\u0627 \u0628\u0631\u0627\u06cc \u06a9\u0627\u0631\u0628\u0631\u062f\u0647\u0627\u06cc\u06cc \u0646\u0638\u06cc\u0631 \u0622\u0626\u0631\u0648\u062f\u06cc\u0646\u0627\u0645\u06cc\u06a9 \u062e\u0627\u0631\u062c\u06cc \u0628\u0627 \u0627\u0639\u062f\u0627\u062f \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u0628\u0627\u0644\u0627 \u0631\u0627 \u067e\u06cc\u0634\u0646\u0647\u0627\u062f \u0645\u06cc\u200c\u062f\u0647\u0646\u062f. \u0628\u062f\u06cc\u0647\u06cc \u0627\u0633\u062a \u0647\u0632\u06cc\u0646\u0647\u200c\u0647\u0627\u06cc \u0645\u062d\u0627\u0633\u0628\u0627\u062a\u06cc \u0632\u0645\u0627\u0646\u06cc\u06a9\u0647 \u0627\u0632 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc DES \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0645\u062a\u0631 \u0627\u0632 LES \u0648 \u0628\u06cc\u0634\u062a\u0631 \u0627\u0632 RANS \u0628\u0627\u0634\u062f. \u0646\u06a9\u062a\u0647 \u0622\u062e\u0631 \u0627\u06cc\u0646\u06a9\u0647 \u0628\u0631\u0627\u06cc \u062a\u0648\u0644\u06cc\u062f \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0635\u0627\u062f\u0641\u06cc \u062f\u0631 \u0648\u0631\u0648\u062f\u06cc\u200c\u0647\u0627 \u062f\u0631 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc SAS \u0648 DES\u060c <a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/les-turbulence-model\/\"><span style=\"color: #3366ff;\"><strong>\u0647\u0645\u0627\u0646\u0646\u062f \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0645\u0631\u062a\u0628\u0637 LES<\/strong><\/span><\/a> \u0639\u0645\u0644 \u0645\u06cc\u200c\u0634\u0648\u062f.&nbsp;<\/span><\/p>\n<p><\/p>\n<h3 style=\"text-align: right;\"><span style=\"color: #ff0000;\"><strong>\u0645\u062f\u0644 DES \u0647\u0645\u0631\u0627 \u0628\u0627 \u0645\u062f\u0644 \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a \u0622\u0644\u0645\u0627\u0631\u0627\u0633 (Spalart-Allmaras)<\/strong><\/span><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644 \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a-\u0622\u0644\u0645\u0627\u0631\u0627\u0633 \u0627\u0632 \u0646\u0632\u062f\u06cc\u06a9\u200c\u062a\u0631\u06cc\u0646 \u0641\u0627\u0635\u0644\u0647 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u062a\u0639\u0631\u06cc\u0641 \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644\u060c d\u060c \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u06a9\u0646\u062f \u06a9\u0647 \u0646\u0642\u0634 \u0627\u0635\u0644\u06cc \u0631\u0627 \u062f\u0631 \u0627\u0646\u062f\u0627\u0632\u0647\u200c\u06af\u06cc\u0631\u06cc \u0633\u0637\u062d \u062a\u0648\u0644\u06cc\u062f \u0648 \u0627\u062a\u0644\u0627\u0641 \u0644\u0632\u062c\u062a \u0622\u0634\u0641\u062a\u06af\u06cc \u0628\u0627\u0632\u06cc \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0645\u062f\u0644 DES \u067e\u06cc\u0634\u0646\u0647\u0627\u062f\u06cc \u0634\u0631 (Shur) \u0645\u0642\u062f\u0627\u0631 <strong>d<\/strong> \u0631\u0627 \u062f\u0631 \u0647\u0631 \u062c\u0627\u06cc\u06cc \u0628\u0627 \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc <strong>d\u02dc<\/strong> \u062a\u0639\u0631\u06cc\u0641 \u0634\u062f\u0647 \u062f\u0631 \u0632\u06cc\u0631 \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646 \u0645\u06cc\u200c\u06a9\u0646\u062f:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4700 aligncenter\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DES-spalart-allmaras.png\" alt=\"\u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 DES-spalart-allmaras\" width=\"176\" height=\"36\"><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u06a9\u0647 <strong>\u0394<\/strong>max \u0628\u0632\u0631\u06af\u062a\u0631\u06cc\u0646 \u0637\u0648\u0644 \u0644\u0628\u0647 \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0627\u0644\u0645\u0627\u0646 \u0634\u0634 \u0648\u062c\u0647\u06cc \u0645\u06a9\u0639\u0628 \u0645\u0633\u062a\u0637\u06cc\u0644 (\u0628\u0631\u0627\u06cc \u0633\u0627\u06cc\u0631 \u0627\u0646\u0648\u0627\u0639 \u0627\u0644\u0645\u0627\u0646\u200c\u0647\u0627 \u0646\u06cc\u0632 \u0627\u0632 \u0645\u0641\u0647\u0648\u0645\u06cc \u0645\u0634\u0627\u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f) \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u062b\u0627\u0628\u062a \u062a\u062c\u0631\u0628\u06cc Cdes \u0646\u06cc\u0632 \u0628\u0631\u0627\u0628\u0631 \u0628\u0627 0.65 \u062a\u0639\u06cc\u06cc\u0646 \u0634\u062f\u0647 \u0627\u0633\u062a. \u0628\u0631\u0627\u06cc \u0634\u0628\u06a9\u0647\u200c\u0647\u0627\u06cc \u0645\u0639\u0645\u0648\u0644\u06cc RANS \u0628\u0627 \u0646\u0633\u0628\u062a \u0645\u0646\u0638\u0631\u06cc \u0628\u0627\u0644\u0627 \u062f\u0631 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0648 \u062c\u0627\u0626\u06cc\u06a9\u0647 \u0641\u0627\u0635\u0644\u0647 \u0634\u0628\u06a9\u0647 \u0645\u0648\u0627\u0632\u06cc \u0628\u0627 \u062f\u06cc\u0648\u0627\u0631\u0647 \u0645\u06cc\u200c\u0628\u0627\u0634\u062f \u0645\u0639\u0645\u0648\u0644\u0627 \u067e\u0627\u0631\u0627\u0645\u062a\u0631 \u03b4 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u0645\u0628\u06cc\u0646 \u0636\u062e\u0627\u0645\u062a \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0627\u0633\u062a\u060c \u0645\u0639\u0627\u062f\u0644\u0647 \u0641\u0648\u0642 \u0636\u0627\u0645\u0646 \u0622\u0646\u0633\u062a \u06a9\u0647 \u0645\u062f\u0644 DES \u062f\u0631 \u062d\u0644 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0647\u0645\u0627\u0646 \u0645\u062f\u0644 RANS \u0628\u0627\u0634\u062f. \u0628\u0647 \u0647\u0631\u0635\u0648\u0631\u062a \u062f\u0631 \u0634\u0631\u0627\u06cc\u0637 \u062a\u0639\u0631\u06cc\u0641 \u0645\u0628\u0647\u0645 \u0634\u0628\u06a9\u0647\u060c \u0627\u06af\u0631 <strong>\u0394<\/strong>max&lt;<strong>\u03b4<\/strong> \u0628\u0627\u0634\u062f\u060c \u0645\u062d\u062f\u0648\u062f \u06a9\u0646\u0646\u062f\u0647 DES \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0645\u0648\u062f LES \u0631\u0627 \u062f\u0631 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0641\u0639\u0627\u0644 \u06a9\u0646\u062f \u062d\u062a\u06cc \u0627\u06af\u0631 \u0634\u0628\u06a9\u0647 \u0628\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u06a9\u0627\u0641\u06cc \u0628\u0631\u0627\u06cc \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u06af\u0631\u062f\u0627\u0628\u0647\u200c\u0647\u0627\u060c \u06a9\u0648\u0686\u06a9 \u0646\u0628\u0627\u0634\u062f. \u0628\u0646\u0627\u0628\u0631\u0627\u06cc\u0646 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u062c\u062f\u06cc\u062f\u06cc \u0627\u0632 DES \u062f\u0631 \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 Fluent \u062f\u0631 \u062f\u0633\u062a\u0631\u0633 \u0627\u0633\u062a \u06a9\u0647 \u0645\u0648\u062f RANS \u0631\u0627 \u062f\u0631 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0646\u06af\u0627\u0647 \u0645\u06cc\u200c\u062f\u0627\u0631\u062f. \u0627\u06cc\u0646 \u0645\u062f\u0644 \u0628\u0647 Delayed DES \u06cc\u0627 DDES \u0645\u0639\u0631\u0648\u0641 \u0627\u0633\u062a. \u062f\u0631 \u0627\u06cc\u0646 \u0645\u062f\u0644 \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc <strong>d\u02dc <\/strong>\u0628\u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f:<\/span><\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"306\" height=\"165\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DDES-spalart-allmaras.png\" alt=\"\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 DDES \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a-\u0622\u0644\u0645\u0627\u0631\u0627\u0633.\" class=\"wp-image-4709\" srcset=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DDES-spalart-allmaras.png 306w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DDES-spalart-allmaras-300x162.png 300w\" sizes=\"auto, (max-width: 306px) 100vw, 306px\" \/><figcaption> \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 DDES \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a-\u0622\u0644\u0645\u0627\u0631\u0627\u0633. <\/figcaption><\/figure><\/div>\n\n\n<h3 style=\"text-align: right;\"><span style=\"color: #ff0000;\"><strong>\u0645\u062f\u0644 DES \u0647\u0645\u0631\u0627 \u0628\u0627 \u0645\u062f\u0644 K-\u03b5 Realizable<\/strong><\/span><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0627\u06cc\u0646 \u0645\u062f\u0644 DES \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u062f\u0644 K-\u03b5 Realizable \u0634\u0631\u062d \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u062f\u0631 <a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/rans-turbulence-models\/\"><span style=\"color: #3366ff;\"><strong>\u0627\u06cc\u0646\u062c\u0627<\/strong><\/span><\/a> \u0645\u06cc\u200c\u0628\u0627\u0634\u062f.\u0628\u0627 \u0627\u06cc\u0646 \u062a\u0641\u0627\u0648\u062a \u06a9\u0647 \u062a\u0631\u0645 \u0627\u062a\u0644\u0627\u0641 \u0628\u0631\u0627\u06cc \u0645\u0639\u0627\u062f\u0644\u0647 K \u062f\u0631 \u0645\u062f\u0644 DES \u0628\u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200e\u200c\u0634\u0648\u062f:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4714 aligncenter\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DES-K-E.png\" alt=\"\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646\" width=\"198\" height=\"249\"><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\"> <strong>\u0394<\/strong>max \u0628\u0632\u0631\u06af\u062a\u0631\u06cc\u0646 \u0637\u0648\u0644 \u0644\u0628\u0647 \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0627\u0644\u0645\u0627\u0646 \u0634\u0634 \u0648\u062c\u0647\u06cc \u0645\u06a9\u0639\u0628 \u0645\u0633\u062a\u0637\u06cc\u0644 (\u0628\u0631\u0627\u06cc \u0633\u0627\u06cc\u0631 \u0627\u0646\u0648\u0627\u0639 \u0627\u0644\u0645\u0627\u0646\u200c\u0647\u0627 \u0646\u06cc\u0632 \u0627\u0632 \u0645\u0641\u0647\u0648\u0645\u06cc \u0645\u0634\u0627\u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f) \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. Cdes=0.61 \u0646\u06cc\u0632 \u062b\u0627\u0628\u062a \u06a9\u0627\u0644\u06cc\u0628\u0631\u0627\u0633\u06cc\u0648\u0646 \u0627\u0633\u062a. \u0627\u06af\u0631 ldes=lrke \u0634\u0648\u062f \u0622\u0646\u06af\u0627\u0647 \u06cc\u06a9 \u062a\u0648\u0635\u06cc\u0641 \u062c\u062f\u06cc\u062f \u0628\u0631\u0627\u06cc \u062a\u0631\u0645 \u0627\u062a\u0644\u0627\u0641 \u062f\u0631 \u0645\u062f\u0644 K-\u03b5 Realizable \u0645\u0637\u0631\u062d \u0645\u06cc\u200c\u06af\u0631\u062f\u062f. \u0647\u0645\u0627\u0646\u0646\u062f DDES\/Spalart-Allmaras\u0650\u060c \u0627\u0632 \u0645\u0641\u0647\u0648\u0645 DDES \u0628\u0631\u0627\u06cc \u0645\u062f\u0644 K-\u03b5 Realizable \u0646\u06cc\u0632 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0646\u0645\u0648\u062f \u06a9\u0647 \u0645\u0648\u062f RANS \u0631\u0627 \u062f\u0631 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u062d\u0641\u0638 \u06a9\u0646\u062f. \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0645\u0641\u0647\u0648\u0645 \u0637\u0648\u0644 ldes \u0628\u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u0628\u0627\u0632\u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4718 aligncenter\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DDES-K-E.png\" alt=\"\u0631\u0627\u0628\u0637\u0647 \u0637\u0648\u0644 \u0645\u0642\u06cc\u0627\u0633 \u062f\u0631 DDES-K-E\" width=\"283\" height=\"37\"><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0628\u0627\u06cc\u062f \u062a\u0648\u062c\u0647 \u062f\u0627\u0634\u062a \u06a9\u0647 <strong>f<\/strong>d \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062f\u0631 \u0645\u0639\u0627\u062f\u0644\u0647 \u0641\u0648\u0642 \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u062f\u0644 \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a-\u0622\u0644\u0645\u0627\u0631\u0627\u0633 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f \u0628\u062c\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u0645\u0642\u062f\u0627\u0631 \u062b\u0627\u0628\u062a \u0627\u0632 8 \u0628\u0647 20 \u062a\u063a\u06cc\u06cc\u0631 \u06a9\u0631\u062f\u0647 \u0648 <strong>\u03bd\u02dc<\/strong> \u062c\u0627\u0646\u0634\u06cc\u0646 (<strong>\u03bd<\/strong> + <strong>\u03bd<\/strong>t) \u062f\u0631 \u0645\u062d\u0627\u0633\u0628\u0627\u062a <strong>K<\/strong>d \u0645\u06cc\u200c\u06af\u0631\u062f\u062f.<\/span><\/p>\n<p><\/p>\n<h3 style=\"text-align: right;\"><span style=\"color: #ff0000;\"><strong>\u0645\u062f\u0644 DES \u0647\u0645\u0631\u0627 \u0628\u0627 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc K-\u03c9 BSL\/SST<\/strong><\/span><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u062a\u0631\u0645 \u0627\u062a\u0644\u0627\u0641 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u0631\u0698\u06cc \u062a\u0639\u0631\u06cc\u0641 \u0634\u062f\u0647 \u062f\u0631 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc K-\u03c9 \u06a9\u0647 \u062f\u0631 <a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/rans-turbulence-models\/\"><span style=\"color: #3366ff;\"><strong>\u0627\u06cc\u0646\u062c\u0627<\/strong><\/span><\/a> \u062a\u0634\u0631\u06cc\u062d \u0634\u062f\u0647 \u0627\u0633\u062a \u0628\u0631\u0627\u06cc \u0645\u062f\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc DES \u0628\u0631\u0627\u0633\u0627\u0633 \u062a\u062d\u0642\u06cc\u0642 \u0645\u0646\u062a\u0631 (Menter) \u0648 \u0628\u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4725 aligncenter\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DES-K-w.png\" alt=\"\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 DES-K-w\" width=\"203\" height=\"168\"><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\"><strong>\u0394<\/strong>max \u0628\u0632\u0631\u06af\u062a\u0631\u06cc\u0646 \u0637\u0648\u0644 \u0644\u0628\u0647 \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0627\u0644\u0645\u0627\u0646 \u0634\u0634 \u0648\u062c\u0647\u06cc \u0645\u06a9\u0639\u0628 \u0645\u0633\u062a\u0637\u06cc\u0644 (\u0628\u0631\u0627\u06cc \u0633\u0627\u06cc\u0631 \u0627\u0646\u0648\u0627\u0639 \u0627\u0644\u0645\u0627\u0646\u200c\u0647\u0627 \u0646\u06cc\u0632 \u0627\u0632 \u0645\u0641\u0647\u0648\u0645\u06cc \u0645\u0634\u0627\u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f) \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. Cdes=0.61 \u0646\u06cc\u0632 \u062b\u0627\u0628\u062a \u06a9\u0627\u0644\u06cc\u0628\u0631\u0627\u0633\u06cc\u0648\u0646 \u0627\u0633\u062a. \u0645\u0642\u062f\u0627\u0631 \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0622\u0634\u0641\u062a\u0647 (Turbulence Length Scale) \u0646\u06cc\u0632 \u067e\u0627\u0631\u0627\u0645\u062a\u0631\u06cc\u0633\u062a \u06a9\u0647 \u0631\u0627\u0628\u0637\u0647 \u0645\u062a\u0646\u0627\u0638\u0631 \u0622\u0646 \u062f\u0631 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0628\u0627\u0644\u0627 \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a. \u0647\u0645\u0686\u0646\u06cc\u0646 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc DES-BSL\/SST \u06af\u0632\u06cc\u0646\u0647\u200c\u0627\u06cc (delayed Option)\u0631\u0627 \u0628\u0631\u0627\u06cc \u0645\u0635\u0648\u0646 \u0646\u06af\u0647 \u062f\u0627\u0634\u062a\u0646 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0627\u0632 \u0645\u062d\u062f\u0648\u062f\u06af\u0631 (Limiter) \u067e\u06cc\u0634\u0646\u0647\u0627\u062f \u0645\u06cc\u200c\u06a9\u0646\u0646\u062f. \u062f\u0631 \u0627\u06cc\u0646 \u062d\u0627\u0644\u062a <strong>F<\/strong>DES \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0627\u0628\u0637\u0647 \u0632\u06cc\u0631 \u0628\u062f\u0633\u062a \u0645\u06cc\u200c\u0622\u06cc\u062f:&nbsp;<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4729 aligncenter\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DES-K-w-Delayed-Option.png\" alt=\"\u0631\u0627\u0628\u0637\u0647 FDES \u062f\u0631 DES-K-w-Delayed Option\" width=\"278\" height=\"107\"><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u06a9\u0647 F1 \u0648 F2 \u062a\u0648\u0627\u0628\u0639 \u0648\u0632\u0646\u06cc \u0645\u062f\u0644 BSL\/SST \u0645\u06cc\u200c\u0628\u0627\u0634\u0646\u062f. \u0627\u0644\u0628\u062a\u0647 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646\u060c \u062a\u0627\u0628\u0639 \u067e\u0648\u0634\u0634 (Shielding Function) \u0645\u062f\u0644 DES \u06cc\u0627 \u0647\u0645\u0627\u0646 \u062a\u0627\u0628\u0639 IDDES \u0646\u06cc\u0632 \u062f\u0631 \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 Fluent \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f. \u0628\u0647 \u0647\u0631 \u062d\u0627\u0644 \u0645\u0642\u0627\u062f\u06cc\u0631 \u067e\u06cc\u0634 \u0641\u0631\u0636 \u0645\u0631\u0628\u0648\u0637\u0647 \u062f\u0631 \u0627\u06cc\u0646 \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u062f\u0644 DDES \u0645\u06cc\u200c\u0628\u0627\u0634\u062f.\u0642\u0627\u0628\u0644 \u062a\u0648\u062c\u0647 \u0627\u0633\u062a \u062f\u0631 \u06a9\u0627\u0631\u0628\u0631\u062f\u0647\u0627\u06cc DDES \u0648 IDDES\u060c\u067e\u0627\u0631\u0627\u0645\u062a\u0631 <strong>f<\/strong>d \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0628\u0627\u0632 \u0647\u0645 \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u062f\u0644 \u0627\u0633\u067e\u0627\u0644\u0627\u0631\u062a-\u0622\u0644\u0645\u0627\u0631\u0627\u0633 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f \u0628\u062c\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u0645\u0642\u062f\u0627\u0631 \u062b\u0627\u0628\u062a \u0627\u0632 8 \u0628\u0647 20 \u062a\u063a\u06cc\u06cc\u0631 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0628\u0647 \u0647\u0631 \u0635\u0648\u0631\u062a \u062a\u0627\u0648\u0628\u0639 \u0648\u0632\u0646\u06cc <strong>F<\/strong>DDES \u0628\u0635\u0648\u0631\u062a \u0632\u06cc\u0631 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4733 aligncenter\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/DES-K-w-FDDES.png\" alt=\"\u062a\u0627\u0628\u0639 \u0648\u0632\u0646\u06cc DES-K-w-FDDES\" width=\"278\" height=\"193\"><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u06a9\u0647 S \u0627\u0646\u062f\u0627\u0632\u0647 \u062a\u0627\u0628\u0639 \u0646\u0631\u062e \u06a9\u0631\u0646\u0634\u060c \u03a9 \u0627\u0646\u062f\u0627\u0632\u0647 \u062a\u0627\u0646\u0633\u0648\u0631 \u0633\u0631\u0639\u062a\u060c y \u0641\u0627\u0635\u0644\u0647 \u062a\u0627 \u062f\u06cc\u0648\u0627\u0631\u0647 \u0648 k=0.41 \u0645\u06cc\u200c\u0628\u0627\u0634\u062f.&nbsp;<\/span><\/p>\n<p><\/p>\n<h3 style=\"text-align: right;\"><span style=\"color: #ff0000;\"><strong>\u0645\u062f\u0644 DES \u0647\u0645\u0631\u0627 \u0628\u0627 \u0645\u062f\u0644\u200c \u06af\u0630\u0631\u0627\u06cc SST<\/strong><\/span><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644 \u06af\u0630\u0631\u0627\u06cc SST \u0631\u0627 \u0646\u06cc\u0632 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0627 \u0631\u0648\u0634 DES \u062a\u0631\u06a9\u06cc\u0628 \u0646\u0645\u0648\u062f. \u062a\u0631\u0645 \u0627\u062a\u0644\u0627\u0641 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644\u06cc \u0627\u0646\u0631\u0698\u06cc \u062c\u0646\u0628\u0634\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0647\u0645\u0627\u0646\u0646\u062f \u0647\u0645\u0627\u0646 \u0645\u062f\u0644 DES-BSL\/SST \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u062a\u0645\u0627\u0645\u06cc \u062a\u0648\u0627\u0628\u0639 \u067e\u0648\u0634\u0634\u06cc \u0646\u06cc\u0632 \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u0646\u0634\u0627\u0646 \u062f\u0627\u062f\u0647 \u0634\u062f\u0647 \u062f\u0631 \u0642\u0633\u0645\u062a \u0642\u0628\u0644 (\u0645\u062f\u0644 DES-BSL\/SST) \u0647\u0633\u062a\u0646\u062f.&nbsp;<\/span><\/p>\n<p><\/p>\n<h3 style=\"text-align: right;\"><span style=\"color: #ff0000;\"><strong>\u0645\u062f\u0644 (Improved Delayed Detached Eddy Simulation (IDDES<\/strong><\/span><\/h3>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644 IDDES \u06cc\u06a9 \u0645\u062f\u0644 \u0647\u06cc\u0628\u0631\u06cc\u062f\u06cc RANS-LES (\u0634\u0627\u0645\u0644 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u062a\u06a9\u0646\u06cc\u06a9\u200c\u0647\u0627\u06cc \u0645\u0648\u062c\u0648\u062f \u0648 \u062c\u062f\u06cc\u062f) \u0645\u06cc\u200c\u0628\u0627\u0634\u062f \u06a9\u0647 \u0645\u062f\u0644 \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u062d\u0644 \u0645\u0642\u06cc\u0627\u0633 (Scale-Resolving Dimulation) \u0631\u0627 \u0628\u0631\u0627\u06cc \u062c\u0631\u06cc\u0627\u0646\u200c\u0647\u0627\u06cc \u0647\u0645\u0631\u0627\u0647 \u0628\u0627 \u0631\u06cc\u0646\u0648\u0644\u062f\u0632\u0647\u0627\u06cc \u0628\u0627\u0644\u0627\u062a\u0631\u060c \u0645\u0646\u0627\u0633\u0628\u200c\u062a\u0631 \u0648 \u0645\u0646\u0639\u0637\u0641\u200c\u062a\u0631 \u0645\u06cc\u200c\u0633\u0627\u0632\u062f. \u0627\u0632 \u0622\u0646\u062c\u0627\u0626\u06cc\u06a9\u0647 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u0627\u06cc\u0646 \u0645\u062f\u0644 \u0628\u0647 \u0646\u0633\u0628\u062a \u067e\u06cc\u0686\u06cc\u062f\u0647 \u0627\u0633\u062a \u0648 \u06a9\u0627\u0631\u0628\u0631\u062f\u0647\u0627\u06cc \u0627\u06cc\u0646 \u0645\u062f\u0644 \u062f\u0631 \u0645\u0633\u0627\u0626\u0644 \u067e\u06cc\u0634 \u067e\u0627 \u0627\u0641\u062a\u0627\u062f\u0647 \u0646\u06cc\u0633\u062a\u060c \u0644\u0630\u0627 \u0627\u0632 \u067e\u0631\u062f\u0627\u062e\u062a\u0646 \u0628\u0647 \u062c\u0632\u0626\u06cc\u0627\u062a \u0622\u0646 \u062e\u0648\u062f\u062f\u0627\u0631\u06cc \u0634\u062f\u0647 \u0627\u0633\u062a. \u0639\u0644\u0627\u0642\u0647\u200c\u0645\u0646\u062f\u0627\u0646 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0646\u062f \u0628\u0631\u0627\u06cc \u06a9\u0633\u0628 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0628\u06cc\u0634\u062a\u0631 \u0628\u0647 \u0645\u0642\u0627\u0644\u0627\u062a \u0634\u0631 \u0648 \u0647\u0645\u06a9\u0627\u0631\u0627\u0646 (Shure et all) \u0648 \u06af\u0631\u06cc\u062a\u0633\u06a9\u0648\u0648\u06cc\u0686 \u0648 \u0647\u0645\u06a9\u0627\u0631\u0627\u0646 (Gritskevich et al) \u0645\u0631\u0627\u062c\u0639\u0647 \u06a9\u0646\u0646\u062f. \u062f\u0631 \u0648\u0627\u0642\u0639 \u0645\u062f\u0644 IDDES \u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u0647\u062f\u0627\u0641 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f DES\u060c \u0627\u0647\u062f\u0627\u0641 \u0632\u06cc\u0631 \u0631\u0627 \u0646\u06cc\u0632 \u062f\u0646\u0628\u0627\u0644 \u0645\u06cc\u200c\u06a9\u0646\u062f:<\/span><\/p>\n<ul>\n<li style=\"text-align: right;\"><span style=\"color: #000000;\">\u0641\u0631\u0627\u0647\u0645 \u0646\u0645\u0648\u062f\u0646 \u067e\u0648\u0634\u0634 \u0645\u0646\u0627\u0633\u0628 \u062f\u0631 \u0628\u0631\u0627\u0628\u0631 \u062c\u062f\u0627\u06cc\u0634 \u0627\u0644\u0642\u0627\u06cc\u06cc \u0634\u0628\u06a9\u0647 ((Grid Induced Separation (GIS) \u0647\u0645\u0627\u0646\u0646\u062f \u0645\u062f\u0644 DDES \u0648&nbsp;<\/span><\/li>\n<li style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062c\u0648\u0632 \u0627\u062c\u0631\u0627 \u06a9\u0631\u062f\u0646 \u0645\u0648\u062f WMLES \u062f\u0631 \u0634\u0631\u0627\u06cc\u0637 \u0645\u0631\u0632\u06cc \u0648\u0631\u0648\u062f\u06cc \u0646\u0627\u067e\u0627\u06cc\u0627 \u0628\u0631\u0627\u06cc \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u062f\u0631 \u062d\u0627\u0644\u062a \u0646\u0627\u067e\u0627\u06cc\u0627.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644 IDDES \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0637\u0631\u0627\u062d\u06cc \u0634\u062f\u0647 \u0627\u0633\u062a \u06a9\u0647 \u0645\u062f\u0644 LES \u0628\u062a\u0648\u0627\u0646\u062f \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0631\u0627 \u062f\u0631 \u0631\u06cc\u0646\u0648\u0644\u062f\u0632\u0647\u0627\u06cc \u0628\u0627\u0644\u0627\u062a\u0631\u06cc \u0646\u0633\u0628\u062a \u0628\u0647 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0627\u0633\u062a\u0627\u0646\u062f\u0627\u0631\u062f \u062e\u0648\u062f \u0634\u0628\u06cc\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0646\u062f. \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646 \u0628\u0631\u0627\u06cc \u0634\u0631\u0627\u06cc\u0637 \u0648\u0631\u0648\u062f\u06cc \u0646\u0627\u067e\u0627\u06cc\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0627\u0632 \u06cc\u06a9 \u0645\u0627\u0646\u0639 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f (\u0647\u0645\u0627\u0646\u0646\u062f \u0642\u0631\u0627\u0631 \u062f\u0627\u062f\u0646 \u06cc\u06a9 \u0631\u06cc\u0628 \u06cc\u0627 \u0645\u0627\u0646\u0639 \u062f\u0631 \u062f\u0627\u062e\u0644 \u06cc\u0627 \u0628\u0627\u0644\u0627\u062f\u0633\u062a \u062c\u0631\u06cc\u0627\u0646 \u062f\u0631 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc).<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">IDDES \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u062f\u0631 \u0646\u0631\u0645 \u0627\u0641\u0632\u0627\u0631 Fluent \u0628\u0631\u0627\u0633\u0627 \u0645\u062f\u0644\u200c\u0647\u0627\u06cc K-\u03c9 BSL\/SST \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0634\u0628\u06cc\u0647 \u0645\u062f\u0644 DES\u060c \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u062a\u0642\u0627\u0644 k \u062f\u0631 \u0645\u062f\u0644 BSL\/SST \u0646\u06cc\u0632 \u0628\u0647 \u0645\u0646\u0638\u0648\u0631 \u067e\u0648\u0634\u0634 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u062f\u0631 \u0641\u0648\u0627\u0635\u0644 \u0634\u0628\u06a9\u0647 \u0645\u062d\u0644\u06cc \u062a\u0635\u062d\u06cc\u062d \u0634\u062f\u0647 \u0627\u0633\u062a. \u0647\u0645\u0686\u0646\u06cc\u0646 \u062f\u0631 \u062d\u0627\u0644\u062a\u06cc\u06a9\u0647 \u0627\u0628\u0639\u0627\u062f \u0634\u0628\u06a9\u0647 \u0628\u0647 \u0627\u0646\u062f\u0627\u0632\u0647 \u06a9\u0627\u0641\u06cc \u0631\u06cc\u0632 \u0628\u0627\u0634\u062f \u0627\u06cc\u0646 \u0645\u062f\u0644 \u0628\u0647 \u0645\u0648\u062f LES \u0633\u0648\u0626\u06cc\u0686 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0628\u0647 \u0647\u0631\u0635\u0648\u0631\u062a \u0647\u062f\u0641 \u0627\u0635\u0644\u06cc \u067e\u0648\u0634\u0634 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u067e\u0627\u06cc\u062f\u0627\u0631 (\u0628\u0647 \u0645\u0639\u0646\u06cc \u0639\u062f\u0645 \u0648\u062c\u0648\u062f \u0634\u0631\u0627\u06cc\u0637 \u0648\u0631\u0648\u062f\u06cc \u0646\u0627\u067e\u0627\u06cc\u062f\u0627\u0631 \u0648 \u06cc\u0627 \u0645\u0648\u0627\u0646\u0639 \u062a\u0648\u0644\u06cc\u062f \u0646\u0627\u067e\u0627\u06cc\u062f\u0627\u0631\u06cc \u062f\u0631 \u0628\u0627\u0644\u0627\u062f\u0633\u062a) \u062f\u0631 \u0645\u0648\u062f RANS \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0628\u0647 \u0645\u0646\u0638\u0648\u0631 \u067e\u0631\u0647\u06cc\u0632 \u0627\u0632 \u062a\u0623\u062b\u06cc\u0631\u067e\u0630\u06cc\u0631\u06cc \u0645\u062f\u0644 BSL\/SST \u062a\u062d\u062a \u0686\u0646\u06cc\u0646 \u0634\u0631\u0627\u06cc\u0637\u06cc\u060c \u062a\u0627\u0628\u0639 IDDES \u0645\u062d\u0627\u0641\u0638\u06cc (Shielding) \u0634\u0628\u06cc\u0647 \u0645\u062f\u0644 DDES \u062a\u0648\u0644\u06cc\u062f \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0628\u0647 \u0627\u06cc\u0646 \u0645\u0639\u0646\u06cc \u06a9\u0647 \u062a\u0644\u0627\u0634 \u0645\u06cc\u200c\u06a9\u0646\u062f \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0631\u0627 \u062f\u0631 \u0645\u0648\u062f RANS \u067e\u0627\u06cc\u062f\u0627\u0631 \u0646\u06af\u0647 \u062f\u0627\u0631\u062f \u062d\u062a\u06cc \u0627\u06af\u0631 \u0634\u0628\u06a9\u0647 \u0631\u06cc\u0632 \u0628\u0627\u0634\u062f. \u062f\u0631 \u0635\u0648\u0631\u062a \u062d\u0644 \u0644\u0627\u06cc\u0647 \u0645\u0631\u0632\u06cc \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 WMLES\u060c \u0644\u0627\u0632\u0645\u0633\u062a \u0634\u0631\u0627\u06cc\u0637 \u0648\u0631\u0648\u062f\u06cc \u0646\u0627\u067e\u0627\u06cc\u062f\u0627\u0631 \u0627\u06cc\u062c\u0627\u062f \u0634\u0648\u062f (<a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/les-turbulence-model\/\"><span style=\"color: #3366ff;\"><strong>\u0628\u0627 \u06cc\u06a9\u06cc \u0627\u0632 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc \u0648\u0631\u062a\u06a9\u0633 \u0645\u062a\u062f \u06cc\u0627 \u0633\u0646\u062a\u0632\u0627\u06cc\u0632\u0631 \u0637\u06cc\u0641\u06cc<\/strong><\/span><\/a>). \u0627\u06cc\u0646 \u0645\u062f\u0644 \u0647\u0645\u0686\u0646\u0627\u0646 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0627 \u06af\u0632\u06cc\u0646\u0647 ELES \u0646\u06cc\u0632 \u0628\u06a9\u0627\u0631 \u06af\u0631\u0641\u062a\u0647 \u0634\u0648\u062f.<\/span><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u0645\u062f\u0644 IDDES-BSL\/SST \u0628\u0631 \u067e\u0627\u06cc\u0647 \u062a\u0631\u0645 \u0627\u062a\u0644\u0627\u0641 \u0645\u0639\u0627\u062f\u0644\u0647 \u0627\u0646\u0631\u0698\u06cc K-\u03c9 SST\/BSL \u062a\u0648\u0633\u0639\u0647 \u06cc\u0627\u0641\u062a\u0647 \u0627\u0633\u062a. \u0644\u0627\u0632\u0645 \u0628\u0647 \u062a\u0648\u0636\u06cc\u062d \u0627\u0633\u062a \u06a9\u0647 \u0645\u0639\u0627\u062f\u0644\u0627\u062a \u03c9 \u062f\u0631 \u0627\u06cc\u0646 \u0645\u062f\u0644\u200c\u0647\u0627 \u0647\u0645\u0686\u0646\u0627\u0646 \u0628\u062f\u0648\u0646 \u062a\u063a\u06cc\u06cc\u0631 \u0628\u0627\u0642\u06cc \u0645\u06cc\u200c\u0645\u0627\u0646\u0646\u062f.&nbsp;<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-4756\" src=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/IDDES-Formulation.png\" alt=\"\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 IDDES\" width=\"600\" height=\"181\" srcset=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/IDDES-Formulation.png 800w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/IDDES-Formulation-300x90.png 300w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/IDDES-Formulation-768x231.png 768w, https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/IDDES-Formulation-360x108.png 360w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/p>\n<p style=\"text-align: right;\"><span style=\"color: #000000;\">\u06a9\u0647 <strong>F_<\/strong>IDDES \u0628\u0631 \u0645\u0628\u0646\u0627\u06cc \u0646\u0633\u0628\u062a \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0622\u0634\u0641\u062a\u0647 RANS \u0628\u0647 \u0645\u0642\u06cc\u0627\u0633 \u0634\u0628\u06a9\u0647 LES (\u062f\u0631 \u0631\u0627\u0628\u0637\u0647 \u0628\u0627\u0644\u0627) \u062a\u0639\u06cc\u06cc\u0646 \u0645\u06cc\u200c\u06af\u0631\u062f\u062f. \u0628\u0627\u06cc\u062f \u062a\u0648\u062c\u0647 \u062f\u0627\u0634\u062a \u0645\u0642\u06cc\u0627\u0633 \u0637\u0648\u0644 \u0632\u06cc\u0631 \u0634\u0628\u06a9\u0647\u060c \u0394\u060c \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0628\u0627 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 DES \u0645\u062a\u0641\u0627\u0648\u062a \u0627\u0633\u062a. \u062f\u0631 \u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 IDDES \u0627\u0632 \u06cc\u06a9 \u0631\u0627\u0628\u0637\u0647 \u06a9\u0644\u06cc\u200c\u062a\u0631 \u0628\u0631\u0627\u06cc \u0394 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0627\u0632 \u0645\u0642\u06cc\u0627\u0633 \u0634\u0628\u06a9\u0647 \u0645\u062d\u0644\u06cc \u0648 \u0641\u0627\u0635\u0644\u0647 \u062a\u0627 \u062f\u06cc\u0648\u0627\u0631\u0647 dw \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. <strong>h<\/strong>max \u0646\u06cc\u0632 \u0628\u0632\u0631\u06af\u062a\u0631\u06cc\u0646 \u0637\u0648\u0644 \u0644\u0628\u0647 \u0628\u0631\u0627\u06cc \u06cc\u06a9 \u0627\u0644\u0645\u0627\u0646 \u0634\u0634 \u0648\u062c\u0647\u06cc \u0645\u06a9\u0639\u0628 \u0645\u0633\u062a\u0637\u06cc\u0644 (\u0628\u0631\u0627\u06cc \u0633\u0627\u06cc\u0631 \u0627\u0646\u0648\u0627\u0639 \u0627\u0644\u0645\u0627\u0646\u200c\u0647\u0627 \u0646\u06cc\u0632 \u0627\u0632 \u0645\u0641\u0647\u0648\u0645\u06cc \u0645\u0634\u0627\u0628\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f) \u0645\u06cc\u200c\u0628\u0627\u0634\u062f. \u0645\u062c\u062f\u062f\u0627 \u06cc\u0627\u062f\u0622\u0648\u0631\u06cc \u0645\u06cc\u200c\u06af\u0631\u062f\u062f \u06a9\u0647 \u0628\u0647 \u062f\u0644\u06cc\u0644 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0631\u0648\u0627\u0628\u0637 \u0627\u0632 \u067e\u0631\u062f\u0627\u062e\u062a\u0646 \u0628\u0647 \u062c\u0632\u0626\u06cc\u0627\u062a \u0622\u0646\u200c\u0647\u0627 \u062f\u0631 \u0627\u06cc\u0646 \u0642\u0633\u0645\u062a \u0635\u0631\u0641 \u0646\u0638\u0631 \u0634\u062f\u0647 \u0627\u0633\u062a.<\/span><\/p>\n<p><\/p>\n\n\n<p style=\"text-align:right\" class=\"has-text-color has-vivid-cyan-blue-color\"><strong><a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/\">\u0628\u0627\u0632\u06af\u0634\u062a<\/a><\/strong><\/p>\n\n\n\n<p style=\"text-align:right\" class=\"has-text-color has-background has-medium-font-size has-vivid-red-color has-cyan-bluish-gray-background-color\"><strong>\u0645\u0637\u0627\u0644\u0628 \u0645\u0631\u062a\u0628\u0637<\/strong><\/p>\n\n\n<h4 style=\"text-align: right;\"><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/cfd-mrk.ir\/index.php\/about-cfd\/cfd-application\/flow-regimes-simulation\/inviscid-laminar-and-turbulent-flow\/\"><strong data-rich-text-format-boundary=\"true\">\u062d\u0644 \u0645\u06cc\u062f\u0627\u0646\u200c\u0647\u0627\u06cc \u062c\u0631\u06cc\u0627\u0646\u200c\u0647\u0627\u06cc \u063a\u06cc\u0631 \u0644\u0632\u062c\u060c \u0622\u0631\u0627\u0645 \u0648 \u0622\u0634\u0641\u062a\u0647 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0646\u0631\u0645\u200c\u0627\u0641\u0632\u0627\u0631\u0647\u0627\u06cc CFD<\/strong><\/a><\/span><\/h4>\n<h4 style=\"text-align: right;\"><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/rans-turbulence-models\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong data-rich-text-format-boundary=\"true\">\u0645\u062f\u0644\u0633\u0627\u0632\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc RANS<\/strong><\/a><\/span><\/h4>\n<h4 style=\"text-align: right;\"><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/rsm-turbulence-model\/\"><strong data-rich-text-format-boundary=\"true\">\u0645\u0639\u0631\u0641\u06cc \u0645\u062f\u0644 \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0646\u0634 \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 (RSM)<\/strong><\/a><\/span><\/h4>\n<h4 class=\"page-title\" style=\"text-align: right;\"><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/les-turbulence-model\/\"><strong>\u0645\u062f\u0644\u0633\u0627\u0632\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc LES<\/strong><\/a><\/span><\/h4>\n\n\n<p style=\"text-align:left\" class=\"has-text-color has-cyan-bluish-gray-color\"><em><a href=\"https:\/\/cfd-mrk.ir\/index.php\/contact-us\/\"><strong>\u0628\u0631\u0627\u06cc \u06a9\u0633\u0628 \u0627\u0637\u0644\u0627\u0639\u0627\u062a \u0628\u06cc\u0634\u062a\u0631 \u0628\u0627 \u0645\u0627 \u062a\u0645\u0627\u0633 \u0628\u06af\u06cc\u0631\u06cc\u062f<\/strong><\/a><\/em><br><\/p>\n\n\n\n<p style=\"color:#1200a3;text-align:left\" class=\"has-text-color\"><strong><em>\u0645\u062d\u0645\u062f\u0631\u0636\u0627 \u06a9\u0644\u06cc\u0686<\/em><\/strong><br><br><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc SAS \u0648 DES SAS and DES; Turbulence Hybrid Models SAS \u0648 DES \u0645\u062f\u0644\u200e\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc\u060c \u0645\u0647\u0645\u062a\u0631\u06cc\u0646\u200c\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc RANS-LES \u0628\u0647 \u0634\u0645\u0627\u0631 \u0645\u06cc\u200c\u0631\u0648\u0646\u062f. \u0627\u0644\u0628\u062a\u0647 \u062f\u0631 \u0627\u0628\u062a\u062f\u0627 \u0628\u0647 \u0646\u0638\u0631 \u0645\u06cc\u200c\u0631\u0633\u062f \u0645\u0641\u0627\u0647\u06cc\u0645 \u0645\u062a\u0648\u0633\u0637 \u06af\u06cc\u0631\u06cc \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u062f\u0631 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc RANS \u0648&hellip;&nbsp;<a href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/sas-and-des-turbulence-nodels\/\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":4683,"parent":3477,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4596","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>(SAS and DES Hybrid RANS-LES Model) \u0645\u062f\u0644\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc DES \u0648 SAS<\/title>\n<meta name=\"description\" content=\"SAS \u0648 DES \u0645\u0647\u0645\u062a\u0631\u06cc\u0646\u200c\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc RANS-LES \u0628\u0647 \u0634\u0645\u0627\u0631 \u0645\u06cc\u200c\u0631\u0648\u0646\u062f. \u0627\u0644\u0628\u062a\u0647 \u062f\u0631 \u0627\u0628\u062a\u062f\u0627 \u0628\u0647 \u0646\u0638\u0631 \u0645\u06cc\u200c\u0631\u0633\u062f \u0645\u0641\u0627\u0647\u06cc\u0645 \u0645\u062a\u0648\u0633\u0637 \u06af\u06cc\u0631\u06cc \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u062f\u0631 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc RANS \u0648\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/sas-and-des-turbulence-nodels\/\" \/>\n<meta property=\"og:locale\" content=\"fa_IR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"(SAS and DES Hybrid RANS-LES Model) \u0645\u062f\u0644\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc DES \u0648 SAS\" \/>\n<meta property=\"og:description\" content=\"SAS \u0648 DES \u0645\u0647\u0645\u062a\u0631\u06cc\u0646\u200c\u0641\u0631\u0645\u0648\u0644\u0627\u0633\u06cc\u0648\u0646 \u062a\u0631\u06a9\u06cc\u0628\u06cc \u0645\u062f\u0644\u200c\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc RANS-LES \u0628\u0647 \u0634\u0645\u0627\u0631 \u0645\u06cc\u200c\u0631\u0648\u0646\u062f. \u0627\u0644\u0628\u062a\u0647 \u062f\u0631 \u0627\u0628\u062a\u062f\u0627 \u0628\u0647 \u0646\u0638\u0631 \u0645\u06cc\u200c\u0631\u0633\u062f \u0645\u0641\u0627\u0647\u06cc\u0645 \u0645\u062a\u0648\u0633\u0637 \u06af\u06cc\u0631\u06cc \u0631\u06cc\u0646\u0648\u0644\u062f\u0632 \u062f\u0631 \u0631\u0648\u0634\u200c\u0647\u0627\u06cc RANS \u0648\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/sas-and-des-turbulence-nodels\/\" \/>\n<meta property=\"og:site_name\" content=\"cfd-mrk\" \/>\n<meta property=\"article:modified_time\" content=\"2019-09-22T04:52:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cfd-mrk.ir\/wp-content\/uploads\/2019\/09\/sas-des.png\" \/>\n\t<meta property=\"og:image:width\" content=\"922\" \/>\n\t<meta property=\"og:image:height\" content=\"434\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0632\u0645\u0627\u0646 \u062a\u0642\u0631\u06cc\u0628\u06cc \u0628\u0631\u0627\u06cc \u062e\u0648\u0627\u0646\u062f\u0646\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 \u062f\u0642\u06cc\u0642\u0647\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/sas-and-des-turbulence-nodels\/\",\"url\":\"https:\/\/cfd-mrk.ir\/index.php\/training\/flow-analysis\/fundamentals-of-cfd\/sas-and-des-turbulence-nodels\/\",\"name\":\"(SAS and DES Hybrid RANS-LES Model) \u0645\u062f\u0644\u0647\u0627\u06cc \u0622\u0634\u0641\u062a\u06af\u06cc \u062a\u0631\u06a9\u06cc\u0628\u06cc DES \u0648 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