{"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":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"My friend Mantovani wants to build a Backward Facing Step flow simulation that includes an LES model. 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