{"id":168909,"date":"2022-04-26T17:52:12","date_gmt":"2022-04-26T17:52:12","guid":{"rendered":"\/forum\/forums\/topic\/definition-of-viscous-force-in-udf\/"},"modified":"2022-05-04T13:50:46","modified_gmt":"2022-05-04T13:50:46","slug":"definition-of-viscous-force-in-udf","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/definition-of-viscous-force-in-udf\/","title":{"rendered":"Definition of viscous force in UDF"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello everyone,<\/p>\n<p>I am writing my master thesis and I am trying to simulate 1DOF oscilations of different cross-sections. To do so, I am using 6DOF UDF (as can be seen below in attached img), but the definition of viscous force (F_STORAGE_R_N3V(f, t, SV_WALL_SHEAR)) gives me SIGSEGV error everytime I try to start the calculation. If I commented the viscous force out (as seen in attached image of udf) it works well.<\/p>\n<p> My supervisor says this definition of viscous force worked for him last year for different project, but doesnt work now. I am using Fluent 2021 R2, but i dont think its version related problem. <\/p>\n<p> Does anyone have similar issues or can somebody help me how to get the viscous force work?<\/p>\n<p> Thanks in advance and if anyone has any questions or more details is needed, feel free to ask.<\/p>\n<p><\/p>\n<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/917\/Z92B49K2MEL5.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/917\/Z92B49K2MEL5.png\" alt=\"Screenshot_1.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-168909","topic","type-topic","status-closed","hentry","topic-tag-1dof-1","topic-tag-6dof-1","topic-tag-udf-fluent","topic-tag-viscous-force-1","topic-tag-wall-shear-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["628"],"_bbp_likes_count":["0"],"_bbp_subscription":["254532"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["168909"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","254532"],"_bbp_voice_count":["2"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["213142"],"_bbp_last_active_id":["213142"],"_bbp_last_active_time":["2022-05-04 13:50:46"]},"test":"bastyx72gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/168909","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\/168909\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=168909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}