{"id":167095,"date":"2022-03-08T09:39:48","date_gmt":"2022-03-08T09:39:48","guid":{"rendered":"\/forum\/forums\/topic\/floating-point-exception-overflow\/"},"modified":"2022-03-08T17:48:33","modified_gmt":"2022-03-08T17:48:33","slug":"floating-point-exception-overflow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/floating-point-exception-overflow\/","title":{"rendered":"Floating point exception: Overflow"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello everyone<\/p>\n<p>I am doing steady state 3D simulation for turbine. Before assembling the whole turbine, I tried simulating only the first stator. Everything was fine and I was able to get results. But when I am trying after assembling 2 stage turbine, I am getting errors like &quot;Floating point exception: Overflow&quot; or &quot;Fatal Overflow of linear solver&quot; before 10th iterations. So I tried simulating the first rotor alone, I am getting the same error. The mesh analysis has no error and even in the CFX solver, under mesh statistics, everything says OK. I tried using different mesh from coarse to very fine mesh. I can see that only the rotor has the error. I am using SST for turbulence model. The heat transfer model is Total Energy. Also, with the same rotor geometry and mesh, when I tried Air at 25C as fluid the simulation ran without any errors. The error pops up when I use Air as Ideal Gas. That&#039;s why it was very confusing and don&#039;t know where exactly the problem is! I created backup file before the error and when I was post-processing the results, the magnitude of velocity is too high (1.9e3).<\/p>\n<p>It would be great if someone could assist me in this situation. If needed I can share my mesh file or CFX file.<\/p>\n<p>Thanks in advance!<\/p>\n","protected":false},"template":"","class_list":["post-167095","topic","type-topic","status-closed","hentry","topic-tag-axial-turbine-2","topic-tag-cfx","topic-tag-rotor-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_btv_view_count":["4836"],"_bbp_likes_count":["0"],"_bbp_subscription":["250756","287250"],"_bbpmt_movedon":["2022-08-26 07:11:08"],"_bbpmt_movedfrom":["27819"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["167095"],"_bbp_forum_id":["27792"],"_bbp_engagement":["68667","250756","287250"],"_bbp_voice_count":["3"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["289126"],"_bbp_last_active_id":["289126"],"_bbp_last_active_time":["2023-06-16 12:05:05"]},"test":"gokkulraj123gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/167095","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\/167095\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=167095"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}