{"id":52057,"date":"2021-02-09T10:18:07","date_gmt":"2021-02-09T10:18:07","guid":{"rendered":"\/forum\/forums\/topic\/time-stepping-convergence-issue-with-a-several-hours-lasting-2-phase-simulation-error-message\/"},"modified":"2021-02-09T10:18:07","modified_gmt":"2021-02-09T10:18:07","slug":"time-stepping-convergence-issue-with-a-several-hours-lasting-2-phase-simulation-error-message","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/time-stepping-convergence-issue-with-a-several-hours-lasting-2-phase-simulation-error-message\/","title":{"rendered":"TIME STEPPING \/ CONVERGENCE ISSUE with a SEVERAL HOURS lasting 2-phase simulation + ERROR MESSAGE"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello there,<\/p>\n<p>I am having severe problems with convergence and my time stepping settings (under &quot;run simulation&quot;).<\/p>\n<p><\/p>\n<\/p>\n<p><strong>Case description:<\/strong><\/p>\n<p>I am doing a transient VOF 2-phase simulation (phase1=nitrogen, phase2=liquid). The special thing about my simulation is that I have a filling process (liquid enters through inlet into tank with v=0.1m\/s) in the beginning for a few seconds (e.g. 10) and then the liquid enters through an interface into a porous zone where it gets soaked, which takes 2-3 hours. The porous zone and the tank are initially completely filled with nitrogen at p=40mbar.<\/p>\n<p> In the following, you can see my case scheme with its BCs:<\/p>\n<div data-embedjson=\"{&quot;url&quot;:&quot;https:\/\/us.v-cdn.net\/6032193\/uploads\/ILSDC9BCFAVE\/case-png.png&quot;,&quot;name&quot;:&quot;Case.PNG&quot;,&quot;type&quot;:&quot;image\/png&quot;,&quot;size&quot;:17068,&quot;width&quot;:782,&quot;height&quot;:562,&quot;embedType&quot;:&quot;file&quot;}\">\n<a href=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/ILSDC9BCFAVE\/case-png.png\" download aria-label=\"Case.PNG\"><br \/>\nCase.PNG<br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-52057","topic","type-topic","status-closed","hentry","topic-tag-convergence","topic-tag-residuals","topic-tag-time-step","topic-tag-time-stepping-method","topic-tag-transient"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["24337"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[" \u0003\u0000\u031f\u0012\u0753??:?l??u"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["3291"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["52057"],"_bbp_forum_id":["27792"],"_bbp_engagement":["25","199","22555","184981"],"_bbp_voice_count":["4"],"_bbp_reply_count":["33"],"_bbp_last_reply_id":["143597"],"_bbp_last_active_id":["143597"],"_bbp_last_active_time":["2021-02-24 14:31:32"]},"test":"raffael_mitrou"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/52057","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\/52057\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=52057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}