{"id":291978,"date":"2023-07-07T00:31:13","date_gmt":"2023-07-07T00:31:13","guid":{"rendered":"\/forum\/forums\/reply\/291978\/"},"modified":"2023-07-07T00:31:13","modified_gmt":"2023-07-07T00:31:13","slug":"291978","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/291978\/","title":{"rendered":"Reply To: Mesh of lattice structure"},"content":{"rendered":"<p>&lt;p&gt;Are you using the patch independent tetrahedral mesher? I think that&#8217;s probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. It sounds like you have just set a body size. You should try to get as much as you can from the global mesh settings, such as using the curvature sizing and maybe also proximity. Set an appropriate minimum curvature size. Use mesh defeaturing to merge node across small problems, and you can experiment with that value also. Set the quality to standard mechanical rather than the default aggressive mechanical:&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688689235-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;If you have defined face patches, you can set more local sizes, like face and edge sizing at the problem location.&lt;\/p&gt;&lt;p&gt;Also, when you set a mesh metric, it will show a histogram. You can change the X and Y axes to see the lowest bar best and adjust that lowest bar to just have a few elements using the &#8220;Controls&#8221;:&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688689489-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688689559-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;Then select that lowest histogram bar. It is always important to visualize why those worse elements are forming that way. You must undertsand what&#8217;s happening in those locations. Then you can use a different mesh size in that location (vertex\/edge sizing or sphere of influence body sizing), or modify geometry, or maybe use Virtual Topology or different defeature size, etc&#8230;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-291978","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Are you using the patch independent tetrahedral mesher? I think that&#039;s probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. It sounds like you have just\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/291978\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Mesh of lattice structure | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Are you using the patch independent tetrahedral mesher? I think that&#039;s probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. 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I think that's probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. 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I think that's probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. 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I think that's probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. It sounds like you have just","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/291978\/#breadcrumblist"},"datePublished":"2023-07-07T00:31:13+00:00","dateModified":"2023-07-07T00:31:13+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Reply To: Mesh of lattice structure | Ansys Learning Forum","og:description":"Are you using the patch independent tetrahedral mesher? I think that's probably the only one that will work well with the latticed, facetted geometry from a topology optimization. There are not clearly defined surface patches so the patch dependent tetrahedral mesher will normally fail on this type of geometry. It sounds like you have just","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/291978\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688689235-mceclip0.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/07-07-2023-1688689235-mceclip0.png","article:published_time":"2023-07-07T00:31:13+00:00","article:modified_time":"2023-07-07T00:31:13+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Mesh of lattice structure | Ansys Learning Forum","twitter:description":"Are you using the patch independent tetrahedral mesher? I think that's probably the only one that will work well with the latticed, facetted geometry from a topology optimization. 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