{"id":164907,"date":"2023-03-17T08:58:55","date_gmt":"2023-03-17T08:58:55","guid":{"rendered":"\/knowledge\/forums\/topic\/fluent6-1-18-fatal-error-when-initializing-from-a-mass-flow-inlet\/"},"modified":"2023-07-31T12:26:30","modified_gmt":"2023-07-31T12:26:30","slug":"fluent6-1-18-fatal-error-when-initializing-from-a-mass-flow-inlet","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/fluent6-1-18-fatal-error-when-initializing-from-a-mass-flow-inlet\/","title":{"rendered":"Fluent6.1.18: Fatal error when initializing from a mass flow inlet"},"content":{"rendered":"<p>The case contains a mass flow inlet. It was attempted to initialize the flow field with values computed from the mass-flow inlet.  Upon initializing, a fatal error (seg. violation) is generated in serial. In parallel, MPI process is terminated.  This case and procedure worked in Fluent6.0.  Fluent6.1.18 has a defect where attempting to compute-defaults from a mass-flow-inlet to initialize the flow field results in a Floating Point error if no current flow data is present.  The workaround is to initialize with the default values, compute-defaults from the mass-flow-inlet, and then reinitialize the flow field.  This can be done through the GUI, but if you are using a journal file, the following can be used:  ;;Fluent6.1.18 has a defect where attempting to compute-defaults ;;from a mass-flow-inlet to initialize the flow field, results in ;;a Floating Point error if no current flow data is present. ;;The workaround is to initialize with the default values,  ;;compute-defaults from the mass-flow-inlet, and then reinitialize ;;the flow field.  This is demonstrated below.  This defect is also ;;fixed in Fluent6.1.19 and above. ;;To use a mass flow inlet to compute initial values in Fluent6.1.18: ;; \/solve\/initialize\/initialize-flow yes ;; \/solve\/initialize\/compute-defaults mass-flow-inlet MASS_INLET_NAME ;; \/solve\/initialize\/initialize-flow yes ;; ;; NOTE: Replace MASS_INLET_NAME with actual surface name. ;;  \/solve\/initialize\/initialize-flow yes \/solve\/initialize\/compute-defaults mass-flow-inlet REPLACE_THIS_STRING \/solve\/initialize\/initialize-flow yes<\/p>\n","protected":false},"template":"","class_list":["post-164907","topic","type-topic","status-publish","hentry","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-general","topic-tag-other"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["3-15-2023  20:20:48"],"_bbp_forum_id":["27796"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["1850"],"siebel_km_number":["741"],"product_version":["Other"],"km_published_date":["2003-05-12T00:00:00.000Z"],"family":["Fluid Dynamics"],"application_name":["FLUENT"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/164907","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\/164907\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=164907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}