{"id":164589,"date":"2023-03-17T08:58:06","date_gmt":"2023-03-17T08:58:06","guid":{"rendered":"\/knowledge\/forums\/topic\/how-does-the-cfx-solver-and-cfx-post-handle-two-boundary-conditions-at-regions-sharing-an-edge\/"},"modified":"2023-07-31T12:25:52","modified_gmt":"2023-07-31T12:25:52","slug":"how-does-the-cfx-solver-and-cfx-post-handle-two-boundary-conditions-at-regions-sharing-an-edge","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-does-the-cfx-solver-and-cfx-post-handle-two-boundary-conditions-at-regions-sharing-an-edge\/","title":{"rendered":"How does the CFX Solver and CFX-Post handle two boundary conditions at regions sharing an edge?"},"content":{"rendered":"<p>The flow solver always uses the exact value specified by the user to calculate the flux through the control volume face on a wall or the inlet when they share an edge (similarly for other combinations of BC&#8217;s). This is because there will be separate control volume faces attached to the wall and inlet for the given  node\/vertex on the shared edge.  Thus, the control volume value is a function of both the wall value and the inlet value (i.e. both values are applied by the flow solver for the same control volume).   The &#8220;hybrid&#8221; value displayed at a node by CFX Post has to be one or the other, and thus is not exactly the boundary condition applied by the flow solver.  Hierarchy for plotting in CFD &#8211; POST in such situations for most variables is (in decreasing order):         Inlet, Fluid Solid Interface, Wall, Opening, Outlet, Interface  Hierarchy for pressure:         Outlet, Fluid Solid Interface, Wall, Inlet, Opening, Interface  Hierarchy for wall only values:         Fluid Solid Interface, Wall, all others have same priority<\/p>\n","protected":false},"template":"","class_list":["post-164589","topic","type-topic","status-publish","hentry","topic-tag-4424","topic-tag-cfx","topic-tag-fluid-dynamics","topic-tag-general-cfx"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["3-15-2023  20:20:36"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["877"],"siebel_km_number":["390299"],"product_version":["16"],"km_published_date":["2005-03-29T00:00:00.000Z"],"family":["Fluid Dynamics"],"application_name":["CFX"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/164589","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\/164589\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=164589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}