{"id":29902,"date":"2018-08-02T21:06:35","date_gmt":"2018-08-02T21:06:35","guid":{"rendered":"\/forum\/forums\/topic\/floating-point-exception-in-fluent\/"},"modified":"2018-08-02T21:06:35","modified_gmt":"2018-08-02T21:06:35","slug":"floating-point-exception-in-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/floating-point-exception-in-fluent\/","title":{"rendered":"Floating point exception in Fluent"},"content":{"rendered":"

I am doing a counter-flow heat exchanger<\/strong> simulation in ANSYS student version.<\/p>\n

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After I setup, I always got error “floating point exception<\/strong>”  in calculation.<\/p>\n

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Please can somebody solve my problem?<\/p>\n

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Intialization result:<\/strong><\/p>\n

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n\"\"<\/p>\n

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During calculation:<\/strong><\/p>\n

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Error:<\/strong><\/p>\n

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There are my all the details:<\/strong><\/em><\/p>\n

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Details:<\/strong><\/p>\n

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It is recirculated exhaust gas heat exchanger<\/strong> which used in gas turbine. It is 200mm<\/strong> long with 60mm<\/strong> diameter.<\/p>\n

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In my geometry, this heat exchanger consists of three parts, hot air fluid domain (outer domain) , 4 solid pipes and 4 inner fluid domain (2 methane and 2 air)<\/strong>. As you can see, there are 8 interfaces in total.<\/p>\n

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This is my meshing. I used adaptive<\/strong> sizing function to get less cells (119610 nodes and 326512 elements<\/strong>). And 4 edge sizing<\/strong> for pipes (20 Division hard). I don’t use culvature size function because it will lead to 3300000 elements which I can’t run it in student version.<\/p>\n

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This is my skewness<\/strong> data.<\/p>\n

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However, in my setup part. There are my setting.<\/p>\n

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Pressure-based<\/p>\n

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Absolute<\/p>\n

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Steady<\/p>\n

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Density on Y direction 9.81<\/p>\n

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Energy Equation On<\/p>\n

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Viscous – Realizable k-e Scalable Wall Function<\/p>\n

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Materials are air, methane and steel<\/p>\n

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Cell Zone Conditions.<\/strong><\/p>\n

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I didn’t coupled my interfaces in Mesh Interfaces.<\/strong><\/p>\n

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In my Boundary Condition.<\/strong> There are 2 air mass- flow-inlet, 2 methane mass-flow-inlet, 1 hot mass-flow-inlet. And 5 pressure outlet in total.<\/p>\n

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All the wall material has been set to Steel.<\/p>\n

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If you need more details, please leave a comment.<\/p>\n

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Thank you very much!<\/p>\n

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Gordon<\/p>\n","protected":false},"template":"","class_list":["post-29902","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["2071"],"_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","0","0","0","0"],"_btv_view_count":["16044"],"_bbp_subscription":["236804","264534"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["29902"],"_bbp_forum_id":["27792"],"_bbp_engagement":["25","158138","187435","264534"],"_bbp_voice_count":["4"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["243360"],"_bbp_last_active_id":["243360"],"_bbp_last_active_time":["2022-12-08 08:21:26"]},"test":"gordongn"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/29902","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\/29902\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=29902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}