{"id":163591,"date":"2021-11-01T02:51:35","date_gmt":"2021-11-01T02:51:35","guid":{"rendered":"\/forum\/forums\/topic\/monitoring-and-judging-solution-convergence\/"},"modified":"2021-11-01T17:13:25","modified_gmt":"2021-11-01T17:13:25","slug":"monitoring-and-judging-solution-convergence","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/monitoring-and-judging-solution-convergence\/","title":{"rendered":"Monitoring  and judging solution convergence"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi ! <\/p>\n<p>I am doing a transient simulation of solidification and melting of a solid block heated on the top surface by a moving laser beam heat source. I have already checked the mesh quality and its pretty good. I have setup the normalized scaled residuals&rsquo; convergence criteria to 1e-6. Also, I am monitoring max velocity and max temperature for solution convergence at each time step and its stop criteria is set to 1e-6. The time step is 1e-6 and iterations per time step is 40. I have provided the photos of all the solver setup I have done. And judging the convergence monitor, I observe the solution convergence does not change after 20 iterations and stays constant at the order of 1e-4 while the residuals are at the order of 1e-2- 1e-3 after 20 iterations. The residuals gradually decrease to the order of 1e-5 to 1e-6 after 40 iterations. Now, my question is, as the solution convergence does not change after 20 iterations, can I decrease my iterations per time step from 40 to 20? And what are the other things should I take note while monitoring convergence?&nbsp;<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/939\/0UZDCDW7RSUR.jpg\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/939\/0UZDCDW7RSUR.jpg\" alt=\"solution methods.JPG\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-163591","topic","type-topic","status-closed","hentry","topic-tag-convergence","topic-tag-monitor-1","topic-tag-residual"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_view_count":["296"],"_bbp_likes_count":["0","0"],"_bbp_forum_subforum_count":["0"],"_btv_view_count":["1949"],"_bbp_subscription":["254697"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["163591"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","180578"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["196477"],"_bbp_last_active_id":["196477"],"_bbp_last_active_time":["2021-11-01 17:13:25"]},"test":"taosif_alam"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/163591","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\/163591\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=163591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}