{"id":171059,"date":"2023-06-05T07:05:36","date_gmt":"2023-06-05T07:05:36","guid":{"rendered":"\/knowledge\/forums\/topic\/getting-error-while-applying-a-symmetry-boundary-condition-to-a-surface-that-is-not-truly-planar-what-is-workaround\/"},"modified":"2023-07-31T12:29:58","modified_gmt":"2023-07-31T12:29:58","slug":"getting-error-while-applying-a-symmetry-boundary-condition-to-a-surface-that-is-not-truly-planar-what-is-workaround","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/getting-error-while-applying-a-symmetry-boundary-condition-to-a-surface-that-is-not-truly-planar-what-is-workaround\/","title":{"rendered":"Getting error while applying a symmetry boundary condition to a surface that is not truly planar. What is workaround?"},"content":{"rendered":"<p>Applying a symmetry boundary condition to a surface that is not truly planar will cause an error in the CFX solver. This non-planar condition can be caused either by the geometry or the mesh (e.g. elements not all lying on the surface, which can happen with &#8220;tented&#8221; elements in ICEM Tetra). The workaround is to assign a free-slip wall.  A free-slip wall has all the same attributes of a symmetry surface:  No gradients of velocity normal to wall, and no velocity components normal to the wall.<\/p>\n","protected":false},"template":"","class_list":["post-171059","topic","type-topic","status-publish","hentry","topic-tag-18-1","topic-tag-cfx","topic-tag-fluid-dynamics","topic-tag-general-cfx","topic-tag-symmetry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["2\/6\/2023 20:20"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["209.182.204.162"],"_btv_view_count":["3446"],"siebel_km_number":["2049645"],"product_version":["18.1"],"km_published_date":["2017-05-19T00:00:00.000Z"],"family":["Fluid Dynamics"],"application_name":["CFX"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/171059","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/171059\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=171059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}