{"id":161587,"date":"2023-01-25T07:16:24","date_gmt":"2023-01-25T07:16:24","guid":{"rendered":"\/knowledge\/forums\/topic\/case-is-diverging-with-non-uniform-mesh-are-there-any-new-recommendations-in-r19-2-2\/"},"modified":"2023-07-31T12:35:33","modified_gmt":"2023-07-31T12:35:33","slug":"case-is-diverging-with-non-uniform-mesh-are-there-any-new-recommendations-in-r19-2-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/case-is-diverging-with-non-uniform-mesh-are-there-any-new-recommendations-in-r19-2-2\/","title":{"rendered":"Case is diverging with non-uniform mesh. Are there any new recommendations in R19.2."},"content":{"rendered":"<p>Simulations that involve non-uniform meshes may experience numerical difficulties, such as solution divergence or non-physical results; note that this is true even when the mesh does not contain any elements that are invalid or of poor quality. A non-uniform mesh is one that has large differences in the volumes of neighboring cells, such as hex cells with hanging node interfaces. When you encounter such numerical difficulties, it is recommended that run the calculation again using a modified version of velocity reconstruction for the Rhie-Chow face flux interpolation. You can enable this by using the following text command:  \/solve  set  non-uniform-mesh-settings  velocity-reconstruction yes  It is also recommended that you enable the warped-face gradient correction (WFGC) for such cases. This can be done as described in Warped-Face Gradient Correction, or (for the sake of convenience) by using the  solve\/set\/non-uniform-mesh-settings\/warped-face-gradient-correction  yes  You can choose either fast mode and Memory Saving Mode<\/p>\n","protected":false},"template":"","class_list":["post-161587","topic","type-topic","status-publish","hentry","topic-tag-19-2","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-general","topic-tag-general-fluent"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Simulations that involve non-uniform meshes may experience numerical difficulties, such as solution divergence or non-physical results; note that this is true even when the mesh does not contain any elements that are invalid or of poor quality. 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