{"id":364544,"date":"2024-04-27T22:03:36","date_gmt":"2024-04-27T22:03:36","guid":{"rendered":"\/forum\/forums\/topic\/fluent-intrinsic-fsi-negative-cell-volumes-in-the-solid-body\/"},"modified":"2024-04-27T22:03:36","modified_gmt":"2024-04-27T22:03:36","slug":"fluent-intrinsic-fsi-negative-cell-volumes-in-the-solid-body","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-intrinsic-fsi-negative-cell-volumes-in-the-solid-body\/","title":{"rendered":"Fluent intrinsic FSI, negative cell volumes in the solid body"},"content":{"rendered":"<p>Hi, I am modeling FSI problem in Fluent-only &#8211; using intrinsic solver.&nbsp;<br \/>I encounter a problem with the negative cell volume, but&nbsp;<strong>in the solid body zone.<\/strong> The dynamic mesh (smoothing) in the fluid region works well.<br \/>Below picture presenting mesh cross-section through a solid domain, clearly shows, that deformation in absorbed mainly in the first cell layer, closest to the fluid.<\/p>\n<p>I did not find any option to tune, for the solid body mesh motion. Also, I do not set any options for the solid body dynamic mesh (only for fluid) in the setup workflow.<br \/>Are there any options to change a dynamic mesh settings for the FEM solid body mesh?<br \/>Or, what else possibly could I try to mitigate the problem? Now I solve a model with reduced timestep size but I really dont think this would help as the time step is already small.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/04\/27-04-2024-1714255195-mceclip2.png\" width=\"638\" height=\"363\"><\/p>\n","protected":false},"template":"","class_list":["post-364544","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["70859","15845"],"_bbp_author_ip":["23.192.127.5"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["260"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["364544"],"_bbp_forum_id":["27792"],"_bbp_engagement":["15845","70859"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["366913"],"_bbp_last_active_id":["366913"],"_bbp_last_active_time":["2024-05-15 09:36:07"]},"test":"marcin-nowak1pg-edu-pl"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/364544","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\/364544\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=364544"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}