{"id":165040,"date":"2023-03-17T08:59:16","date_gmt":"2023-03-17T08:59:16","guid":{"rendered":"\/knowledge\/forums\/topic\/segmentation-fault-during-initialization-of-multispecies-case\/"},"modified":"2023-07-31T12:26:47","modified_gmt":"2023-07-31T12:26:47","slug":"segmentation-fault-during-initialization-of-multispecies-case","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/segmentation-fault-during-initialization-of-multispecies-case\/","title":{"rendered":"Segmentation fault during initialization of multispecies case"},"content":{"rendered":"<p>During initialization of a multispecies case the following segmentation faul can occur under certain conditions:  Node 3 Fatal signal raised sig = Segmentation fault  570f8120 CX_Primitive_Error  656d0cc0 seh_filter_exe  5719ec80 logical_right_shift  55d7ec30 _C_specific_handler  67ff1f80 _chkstk  67fa1020 RtlRaiseException  67ff0ba0 KiUserExceptionDispatcher  54de35b0 Switch_Species_Data  This was observed for a case with a inlet species mass fraction being defined by an expression that depends on report definitions, i.e.      (-1*{outlet_air}*{outlet-air-co2}*1[s kg^-1])\/(0.0034) The expression result in this case actually is correctly non-dimensional and so the expression is correct.  Workaround is to 1. set the expression to a constant value, i.e. 0 2. initialize 3. revert the expression to the original setting 4. start solver  This issue does not occur in 2022 R1 and following.<\/p>\n","protected":false},"template":"","class_list":["post-165040","topic","type-topic","status-publish","hentry","topic-tag-2021-r2","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-general","topic-tag-non-reacting","topic-tag-species-reactions"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["3-15-2023  20:20:00"],"_bbp_forum_id":["27784"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["1781"],"siebel_km_number":["2067948"],"product_version":["2021 R2"],"km_published_date":["2022-06-10T00:00:00.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165040","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165040\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=165040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}