{"id":29510,"date":"2018-06-17T19:25:32","date_gmt":"2018-06-17T19:25:32","guid":{"rendered":"\/forum\/forums\/topic\/ideal-mesh-for-les-fluid-flow-simulation\/"},"modified":"2018-06-17T19:25:32","modified_gmt":"2018-06-17T19:25:32","slug":"ideal-mesh-for-les-fluid-flow-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ideal-mesh-for-les-fluid-flow-simulation\/","title":{"rendered":"Ideal mesh for LES fluid flow simulation"},"content":{"rendered":"<p>My friend Mantovani wants to build a <a href=\"\/thread\/erro-when-loading-the-results-on-cfd-post\/?order=all#comment-67856157-ac67-4d4f-a12d-a8fd0008d835\">Backward Facing Step<\/a> flow simulation that includes an LES model.<\/p>\n<p><\/p>\n<p>Here is some guidance on meshing for LES that Mantovani found:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/3e825b35-df61-45f5-9693-a81101684b62\/305b155b-c411-4bbd-bd4e-a902013f61b2_peter.jpg?width=690&amp;upscale=false\" alt=\"\">&nbsp;<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Here I applied the concept of Adapted Mesh that preserves aspect ratio to the backward facing step problem.<br \/>The first image shows the length of the inlet to the step. The length to the outlet from the step is much larger.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/3e825b35-df61-45f5-9693-a81101684b62\/d5f7271b-7294-4606-80a3-a902018826f0_a--bfs---meshing-[ansys-academic-teaching-introductory]-2018-06-17-19-45-08.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>The second image shows the mesh details around the step.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/3e825b35-df61-45f5-9693-a81101684b62\/3b6e8e11-d306-455d-bf1e-a902018844a8_a--bfs---meshing-[ansys-academic-teaching-introductory]-2018-06-17-19-46-26.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>While the element sizes for this illustration may be far too large for a good result, they can be easily reduced to a proper size.<\/p>\n<p><\/p>\n<p>Any comments from the community are welcome.<\/p>\n<p><\/p>\n<p>Attached is an ANSYS 19.0 archive.<\/p>\n","protected":false},"template":"","class_list":["post-29510","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["1679"],"_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","0","0","0","0"],"_btv_view_count":["4312"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["29510"],"_bbp_forum_id":["27790"],"_bbp_engagement":["62","199","240","14986","154942","155059","169506","171687"],"_bbp_voice_count":["8"],"_bbp_reply_count":["11"],"_bbp_last_reply_id":["113484"],"_bbp_last_active_id":["113484"],"_bbp_last_active_time":["2020-05-04 16:20:07"]},"test":"peteroznewman"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/29510","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\/29510\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=29510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}