{"id":290816,"date":"2023-06-28T23:11:27","date_gmt":"2023-06-28T23:11:27","guid":{"rendered":"\/forum\/forums\/topic\/neumann-boundary-condition-2\/"},"modified":"2023-06-28T23:11:27","modified_gmt":"2023-06-28T23:11:27","slug":"neumann-boundary-condition-2","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/neumann-boundary-condition-2\/","title":{"rendered":"Neumann boundary condition"},"content":{"rendered":"<p>Hi everyone&nbsp;<\/p>\n<p>How does one set the diffusion flux equal to zero at the inlets and outlets as a boundary condition to create a closed system in the species model instead of specifying mass fraction? or does fluent assume this condition if you haven&#8217;t clicked the inlet diffusion option?&nbsp;<\/p>\n","protected":false},"template":"","class_list":["post-290816","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["190863","15180"],"_bbp_author_ip":["23.33.28.204"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["388"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["290816"],"_bbp_forum_id":["27792"],"_bbp_engagement":["15180","190863"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["290901"],"_bbp_last_active_id":["290901"],"_bbp_last_active_time":["2023-06-29 11:59:30"]},"test":"meyzeeh"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/290816","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\/290816\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=290816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}