{"id":54542,"date":"2021-04-22T02:55:59","date_gmt":"2021-04-22T02:55:59","guid":{"rendered":"\/forum\/forums\/topic\/error-divergence-detected-in-amg-solver-epsilon\/"},"modified":"2021-04-22T02:55:59","modified_gmt":"2021-04-22T02:55:59","slug":"error-divergence-detected-in-amg-solver-epsilon","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-divergence-detected-in-amg-solver-epsilon\/","title":{"rendered":"Error: Divergence detected in AMG solver: epsilon"},"content":{"rendered":"<p>Hello guys,\u00a0nI&#8217;m having problems with my simulation and I don&#8217;t know for sure what is happening. If anyone could help me, I&#8217;d really appreciate it.nMy simulation is an intake from a reservoir, where the inlet is a constant velocity (velocity-inlet BC) and the outlet works like a valve, so I have a governing equation for my outlet, which is:(730.39 [kg s^-2] * Time), and I&#8217;m using mass-flow-outlet BC. My mesh has good values for ortogonality quality and skewness.nHowever, after some interactions of standard k-epsilon, the calculation crashes and returns the message:Error at Node 2:floating point exceptionnError at Node 0:floating point exceptionnError at Node 1:floating point exceptionnError at Node 3:floating point exception\u00a0\u00a0\u00a0\u00a0nStabilizing epsilon to enhance linear solver robustness.\u00a0\u00a0\u00a0\u00a0nStabilizing epsilon using GMRES to enhance linear solver robustness.nDivergence detected in AMG solver:epsilon\u00a0nturbulent viscosity limited to viscosity ratio of 1.000000e+05 in 61502 cells\u00a0nDivergence detected in AMG solver:epsilonnDivergence detected in AMG solver:epsilonnDivergence detected in AMG solver:epsilonnError at host:floating point exceptionI&#8217;m using hybrid initialization. Does anyone know how to solve this, please?nThank you in advance,nLuisa.<\/p>\n","protected":false},"template":"","class_list":["post-54542","topic","type-topic","status-closed","hentry","topic-tag-bc","topic-tag-divergence","topic-tag-k-epsilon","topic-tag-turbulence"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["26877"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":["?C?^"],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1980"],"_bbp_subscription":["254476"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["54542"],"_bbp_forum_id":["27792"],"_bbp_engagement":["118","180360"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["150825"],"_bbp_last_active_id":["150825"],"_bbp_last_active_time":["2021-04-26 21:33:04"]},"test":"luisaciriaco"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/54542","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\/54542\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=54542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}