{"id":168552,"date":"2022-04-17T05:38:51","date_gmt":"2022-04-17T05:38:51","guid":{"rendered":"\/forum\/forums\/topic\/confusing-converging-non-converging-fsi-outputs-in-system-coupling-2\/"},"modified":"2022-04-19T09:43:06","modified_gmt":"2022-04-19T09:43:06","slug":"confusing-converging-non-converging-fsi-outputs-in-system-coupling-2","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/confusing-converging-non-converging-fsi-outputs-in-system-coupling-2\/","title":{"rendered":"Confusing converging\/non-converging FSI outputs in System Coupling"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi! I hope you are all doing great! I know this post is a bit long, but I also find my situation very interesting, I hope some of you may find the time to fully read it and hopefully give me some guidance on it, for which I thank you in advance!<\/p>\n<p>I am currently working on a project that involves studying Fluid-Structure Interaction (FSI) between air (the fluid) and an aircraft wing (which is the structure). I first study the steady interaction between those two, using the &quot;Static Structural&quot; module for the wing, the &quot;Steady&quot; option in fluent, and I couple both using system coupling. Where I must set both a minimum and a maximum number of iterations, those being (currently) 1 iteration and 14 iterations, respectively.<\/p>\n<p>The strange thing occurs in System Coupling, where I obtain some contradictory information in the output:<\/p>\n<p>First of all, the convergence target for both participants (Fluent and Static Structural) is an RMS change of 0.01 (1.00E-002), now, take a look at the results of the first iteration:<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/007\/K8QGZXJ8PKZT.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/007\/K8QGZXJ8PKZT.png\" alt=\"image.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-168552","topic","type-topic","status-closed","hentry","topic-tag-2-way-coupled-fsi","topic-tag-convergence","topic-tag-fsi","topic-tag-inconsistency","topic-tag-system-coupling"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["292"],"_bbp_likes_count":["0"],"_bbp_subscription":["247148"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["168552"],"_bbp_forum_id":["27791"],"_bbp_engagement":["62","247148"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["211938"],"_bbp_last_active_id":["211938"],"_bbp_last_active_time":["2022-04-19 09:43:06"]},"test":"freddy-maan-di-campligmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/168552","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\/168552\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=168552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}