{"id":239145,"date":"2022-10-31T11:16:53","date_gmt":"2022-10-31T11:16:53","guid":{"rendered":"\/forum\/forums\/topic\/fluent-freezes-during-calculation\/"},"modified":"2022-11-01T11:07:39","modified_gmt":"2022-11-01T11:07:39","slug":"fluent-freezes-during-calculation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fluent-freezes-during-calculation\/","title":{"rendered":"Fluent freezes during calculation"},"content":{"rendered":"<p>Hi Ansys community,<\/p>\n<p>When running my simulation the simulation will start freezing at some point during the calculation. No matter how long I wait, it keeps freezing leaving me with no point than shutting down fluent via the task manager and losing my data.&nbsp;<\/p>\n<p>I&#8217;ve been trying to solve this bug for two weeks but I don&#8217;t find what seems to be the problem. My setup is as follows: Transient simulation, SST k-omega model and PISO method, multiple udf&#8217;s (describing wall motion and velocity profile at inlet), outlet as outflow, solving parallel with 6 cores.<\/p>\n<p>When testing the UDF by analysing the dynamic mesh motion it does not give any trouble, so therefore I think the problem does not come from the UDF describing the dynamic wall. The UDF describing the velocity profile is just a simple example from the forum with changed values.&nbsp;<\/p>\n<p>So I tried testing the calculation with different timesteps and meshsize and this resulted in analysis seen in the picture below.&nbsp;<\/p>\n<p>Anyone that knows where the problem is coming from?<\/p>\n<p>Kind regards<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/10\/31-10-2022-1667214995-Error analysis.PNG\" alt=\"\" width=\"900\" height=\"617\"><\/p>\n","protected":false},"template":"","class_list":["post-239145","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["266007","199"],"_bbp_author_ip":["96.7.74.173"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2901"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["239145"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","266007"],"_bbp_voice_count":["2"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["239296"],"_bbp_last_active_id":["239296"],"_bbp_last_active_time":["2022-11-01 11:07:34"]},"test":"vincent-bryonntnu-no"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/239145","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\/239145\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=239145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}