{"id":35191,"date":"2019-05-07T23:52:30","date_gmt":"2019-05-07T23:52:30","guid":{"rendered":"\/forum\/forums\/topic\/using-overset-mesh-in-3d-with-symmetry-plane\/"},"modified":"2019-05-07T23:52:30","modified_gmt":"2019-05-07T23:52:30","slug":"using-overset-mesh-in-3d-with-symmetry-plane","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/using-overset-mesh-in-3d-with-symmetry-plane\/","title":{"rendered":"Using overset mesh in 3D with symmetry plane"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I have a question regarding using overset interfaces along with an axi-symmetric domain in 3D. I am trying to simulate a rectangular box floating on water. When I create the overset interface between the fluid domain and overset component, I end up with orphan cells around where the overset component is cut in half by the domain symmetry plane. It makes sense since it needs 4 cells between boundaries to create a good overset. My question is how do I (or can I) use overset interfaces with a symmetric boundary condition?<\/p>\n<p><\/p>\n<p>The yellow cells are the symmetry boundary condition for the fluid domain; the grey ones are the box that I am trying to analyze, and the red cells are the orphan cells. Other details are that I am using Fluent with ANSYS R19.2 and am using the student version. I know the elements are coarse but I am trying to compare half-model results with that of the full model. Full model is running close to the element limit and I want to keep the element size between the full and half models the same for comparison.<\/p>\n<p><\/p>\n<p>Any help would be greatly appreciated!<\/p>\n<p><\/p>\n<p>Peter<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Edit 1: Embedded picture of mesh and orphan cells. <\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/6ee286e0-38dc-4b22-bed3-aa4601821a85\/234dd7cc-b45e-4c75-ac9c-aa460189fb19_orphan-cells.jpg?width=690&amp;upscale=false\" alt=\"Mesh showing orphan cells\"><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-35191","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["7363"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0"],"_btv_view_count":["1530"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["35191"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","165133"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["84792"],"_bbp_last_active_id":["84792"],"_bbp_last_active_time":["2019-05-08 13:35:24"]},"test":"extremepeta"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/35191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/35191\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=35191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}