{"id":45416,"date":"2020-06-24T07:15:18","date_gmt":"2020-06-24T07:15:18","guid":{"rendered":"\/forum\/forums\/topic\/floating-point-error-with-extreme-velocities-entering-at-junction\/"},"modified":"2020-06-24T07:15:18","modified_gmt":"2020-06-24T07:15:18","slug":"floating-point-error-with-extreme-velocities-entering-at-junction","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/floating-point-error-with-extreme-velocities-entering-at-junction\/","title":{"rendered":"Floating point error with Extreme velocities entering at junction"},"content":{"rendered":"<p>Dear all,<\/p>\n<p><\/p>\n<p>I work with 3D, Transient, VOF(Water and air), Open Channel problem with &#8216;Flow past row of cylinders mounted at the bottom wall&#8217;.<\/p>\n<p><\/p>\n<p>I run fluent in parallel mode. The code crash with floating point error as shown below.<\/p>\n<p><\/p>\n<p>Divergence detected in AMG solver: omega<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 889546 cells<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;Divergence detected in AMG solver: omega<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;Divergence detected in AMG solver: omega<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;Divergence detected in AMG solver: omega<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;Divergence detected in AMG solver: omega<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;Divergence detected in AMG solver: omega<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;Error at host: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Error at Node 0: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Error at Node 1: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Error at Node 2: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Error at Node 3: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Error at Node 4: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Error at Node 5: floating point exception<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">===============Message from the Cortex Process================================<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">Compute processes interrupted. Processing can be resumed.<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;==============================================================================<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;<span style=\"color: #ff0000;\">Error: floating point exception<\/span><\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;<span style=\"color: #ff0000;\">Error Object: #f<\/span><\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;<\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\"><span style=\"color: #ff0000;\">When i plot velocity vectors, i observe velocities of extreme values are entering at one of the junction location of cylinder and bottom wall.the snapshot is attached.<img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/4ca64de2-6164-4386-8ea2-ab68006eed85\/ec1d3623-ded8-467f-bdc4-abe4007776eb_xtremevel.jpg?width=690&amp;upscale=false\" alt=\"xrtreme velocities\"><\/span><\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\"><span style=\"color: #ff0000;\">Kindly help. Thanks in advance.<\/span><\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\"><span style=\"color: #ff0000;\">Regards,<\/span><\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\"><span style=\"color: #ff0000;\">Prabu<\/span><\/p>\n<p><\/p>\n<p style=\"-qt-block-indent: 0; text-indent: 0px; margin: 0px;\">&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-45416","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["17597"],"_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":["244"],"_bbp_subscription":["247776"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["45416"],"_bbp_forum_id":["27792"],"_bbp_engagement":["118","199","22555","173524"],"_bbp_voice_count":["4"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["119226"],"_bbp_last_active_id":["119226"],"_bbp_last_active_time":["2020-06-27 09:50:57"]},"test":"prabupeter"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/45416","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\/45416\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=45416"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}