{"id":165262,"date":"2022-01-04T12:03:18","date_gmt":"2022-01-04T12:03:18","guid":{"rendered":"\/forum\/forums\/topic\/unusual-temperature-gradients\/"},"modified":"2022-01-17T14:26:51","modified_gmt":"2022-01-17T14:26:51","slug":"unusual-temperature-gradients","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/unusual-temperature-gradients\/","title":{"rendered":"Unusual temperature gradients"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hey guys!<\/p>\n<p>Quick question. I want to investigate the temperature fields in the boundary layer due to friction. I am using the k-omega-SST-model and an adiabatic wall (heat flux = 0). The flow is coming with a velocity of 18 m\/s over an airfoil with an angle of attack of 8 degrees. The temperature of the flow is 278,15K (5 &deg;C).<\/p>\n<p>My calculated value (by hand) for dT should be something like 0,16-0,2 K but if I run the simulation i will get for the adiabatic wall a dT of 2,2 K or something.<\/p>\n<p>Here are my settings:<\/p>\n<p>&#8211; Energy is on<\/p>\n<p>&#8211; viscous heating is on<\/p>\n<p>&#8211; heat flux = 0 (adiabatic wall)<\/p>\n<p>&#8211; wall thickness 3mm ( 0,003m)<\/p>\n<p>Can someone tell my why my results are so different than the analytical ones? I reduced the criteria for the residuals and increased the number of itereations to increase the quality of the solution but this didnt help. Can you help me here?<\/p>\n<p>Thanks in advance!<\/p>\n","protected":false},"template":"","class_list":["post-165262","topic","type-topic","status-closed","hentry","topic-tag-bug-licensing-error-1","topic-tag-fluent-ansys-2"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["832"],"_bbp_likes_count":["0"],"_bbp_subscription":["242633"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["165262"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","22555","242633"],"_bbp_voice_count":["3"],"_bbp_reply_count":["23"],"_bbp_last_reply_id":["201822"],"_bbp_last_active_id":["201822"],"_bbp_last_active_time":["2022-01-17 14:26:51"]},"test":"loxliker007gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/165262","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/165262\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=165262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}