{"id":40886,"date":"2020-02-12T18:25:22","date_gmt":"2020-02-12T18:25:22","guid":{"rendered":"\/forum\/forums\/topic\/fluent-airfoil-analysis-compressible-viscous-flow\/"},"modified":"2020-02-12T18:25:22","modified_gmt":"2020-02-12T18:25:22","slug":"fluent-airfoil-analysis-compressible-viscous-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-airfoil-analysis-compressible-viscous-flow\/","title":{"rendered":"Fluent airfoil analysis- compressible viscous flow"},"content":{"rendered":"<p>Hi guys, I&#8217;ve to analyze flow field around an airfoil (DAE-21, low Reynolds airfoil) under the assumptions of compressible and viscous flow. I&#8217;ve to make different analysis increasing Mach number with the aim to find lambda shock wave on airfoil surface. I&#8217;ve problem with fluent analysis with Mach number &gt; 0.4 (this analysis is ok). In meshing I&#8217;ve added inflation (setting y+=1 using y+ calculator online). When I try to analyze the case M=0.568 and above Mach number, fluent give me following errors: &#8220;Divergence detected &#8211; temporarily reducing time step.. Stabilizing Coupled to enhance linear solver robustness&#8221;;&nbsp; &#8220;time step reduced in 1 cells due to excessive temperature change&#8221; and so the continuity grows up.<br \/>The following one are meshing setup:<br \/><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/1d551fc2-5bb5-46be-9fcc-ab5500fc529f\/df03d311-5ce8-45d5-b0d2-ab5f012d6d71_mesh1.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/1d551fc2-5bb5-46be-9fcc-ab5500fc529f\/df9281ab-5207-49ad-92b2-ab5f012d7e17_mesh2.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/1d551fc2-5bb5-46be-9fcc-ab5500fc529f\/571e9c81-4e9c-4532-9408-ab5f012d8c89_mesh-3.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>Setup Fluent:<br \/><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/1d551fc2-5bb5-46be-9fcc-ab5500fc529f\/f7fa78ad-7ea6-457f-bf2a-ab5f012eeb1a_solutore-setup.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Fluent response:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/1d551fc2-5bb5-46be-9fcc-ab5500fc529f\/5e2ee2f1-4360-4cf0-a489-ab5f012f254e_fluent-result.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>I&#8217;m sorry for the for the excessive length of the massage, but I hope I&#8217;ll get help<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-40886","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["13066"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["821"],"_bbp_subscription":["247099"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["40886"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","172823"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["105341"],"_bbp_last_active_id":["105341"],"_bbp_last_active_time":["2020-02-13 16:56:26"]},"test":"aerospace24"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/40886","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\/40886\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=40886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}