{"id":37480,"date":"2019-09-04T06:59:16","date_gmt":"2019-09-04T06:59:16","guid":{"rendered":"\/forum\/forums\/topic\/ansys-fluent-dynamic-mesh-works-in-preview-but-crashes-in-calculation\/"},"modified":"2019-09-04T06:59:16","modified_gmt":"2019-09-04T06:59:16","slug":"ansys-fluent-dynamic-mesh-works-in-preview-but-crashes-in-calculation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-fluent-dynamic-mesh-works-in-preview-but-crashes-in-calculation\/","title":{"rendered":"Ansys Fluent dynamic mesh works in preview, but crashes in calculation"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I&#8217;m running into a strange problem. I am running a transient flow simulation in Fluent. In this simulation there is a moving flap in the outflow of a pipe. For the moving part I am using dynamic meshing. I played around with the settings and the initial mesh, so that it seemed appropriate for the dynamic meshing.&nbsp;<\/p>\n<p><\/p>\n<p>When I preview the dynamic meshing process in Fluent, everything seems to be ok. No faults or errors and the mesh looks fine. But when I start the calculation process (same time step as in the preview process) after 40 to 50 time steps, I get the error message of negativ cell volume. This doesn&#8217;t happen in the preview process. There the mesh behaves fine for 500 time steps.<\/p>\n<p><\/p>\n<p>What could that be ?<\/p>\n","protected":false},"template":"","class_list":["post-37480","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["9658"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0"],"_btv_view_count":["1016"],"_bbp_subscription":["242606"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["37480"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","168155"],"_bbp_voice_count":["2"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["94219"],"_bbp_last_active_id":["94219"],"_bbp_last_active_time":["2019-09-13 14:13:30"]},"test":"mrrioes"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/37480","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\/37480\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=37480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}