{"id":457565,"date":"2026-05-04T17:50:15","date_gmt":"2026-05-04T17:50:15","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic-mesh-for-huge-deformation\/"},"modified":"2026-05-06T12:44:20","modified_gmt":"2026-05-06T12:44:20","slug":"dynamic-mesh-for-huge-deformation","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/dynamic-mesh-for-huge-deformation\/","title":{"rendered":"Dynamic mesh for huge deformation"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;Hi &lt;br&gt;i am running dynamic mesh using UDF on Fluent and my simulation crash and this is how mesh preview looks like. as you can see it gets jagged in some regions. i have been trying different remeshing and smoothing and this is what i got at best (18% run then crash with negative cell volume) . if you could hav any thhoughts on how to handle extrenly large deformation in complex gemetry i appreciate it.&nbsp; mesh size: 2mm tetrahedral (i also tried 0.5, 1, 2, 4 and in each scenario polyhedra but failed and so far this case is the longest-run i have made), time-step: 0.001, smoothing: spring\/laplace\/boundary layer with diffusion parameter=0.5, Generalized Boundary Distance Method activated, (i also tried diffusion-based) , remeshing: method&#8217;s based only change the size remeshing interval from 5 (default) to 1., max face skewness limit= 0.7)&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-457565","topic","type-topic","status-publish","hentry","topic-tag-dynamic-mesh"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["457565"],"_bbp_author_ip":["130.215.190.180"],"_bbp_last_reply_id":["457862"],"_bbp_last_active_id":["457862"],"_bbp_last_active_time":["2026-05-08 10:18:58"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["431728","34559"],"_btv_view_count":["82"],"_bbp_topic_status":["unanswered"],"_edit_last":["431728"],"_bbp_revision_log":["a:1:{i:457691;a:2:{s:6:\"author\";i:431728;s:6:\"reason\";s:0:\"\";}}"],"_bbp_subscription":["34559"]},"test":"751ef47ef94a7db2035eda1dd10abecb4b252174"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457565","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457565\/revisions"}],"predecessor-version":[{"id":457691,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457565\/revisions\/457691"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=457565"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}