{"id":160788,"date":"2021-07-28T17:41:08","date_gmt":"2021-07-28T17:41:08","guid":{"rendered":"\/forum\/forums\/topic\/do-model-makes-simulation-diverging\/"},"modified":"2021-08-04T18:59:21","modified_gmt":"2021-08-04T18:59:21","slug":"do-model-makes-simulation-diverging","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/do-model-makes-simulation-diverging\/","title":{"rendered":"DO-model makes simulation diverging"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Dear Ansys,<\/p>\n<p>I have a 3D model including Energy Model, k-eps turbulence and DO Radiation model (Solar Loading). I indicated 2 radiation bands. However when I activate the radiation model the simulation diverges. Tuning the under relaxation values does not work, neither does decreasing the time step 50 times compared to the same simulation but without radiation that runs perfectly. I have a total of 1 million mesh elements. <\/p>\n<p>See enclosed the residual plot of the version with and without radiation model. Now the relaxation value of do-intensity is set to 0.1, but also when set to 0.5 or 0.9 or 1, the solution converges (already at the beginning).<\/p>\n<p><\/p>\n<\/p>\n<p>What could be the issue? And what different things I could try to solve this?<\/p>\n<p>That would really be helpful, thank you in adv!<\/p>\n<p><\/p>\n<\/p>\n<p>Yannice<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/998\/XQRI8VU6WUOW.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/998\/XQRI8VU6WUOW.png\" alt=\"without DO-model.PNG\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-160788","topic","type-topic","status-closed","hentry","topic-tag-divergence-issues","topic-tag-do-intensity-1","topic-tag-do-model-2","topic-tag-residuals"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["813"],"_bbp_likes_count":["0"],"_bbp_subscription":["240721"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["160788"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","201606"],"_bbp_voice_count":["2"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["187022"],"_bbp_last_active_id":["187022"],"_bbp_last_active_time":["2021-08-04 18:59:21"]},"test":"yannicedekoninggmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/160788","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\/160788\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=160788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}