{"id":30574,"date":"2018-09-25T02:54:04","date_gmt":"2018-09-25T02:54:04","guid":{"rendered":"\/forum\/forums\/topic\/need-answer-of-very-basic-questions-what-is-back-flow-in-fluent-simulation\/"},"modified":"2018-09-25T02:54:04","modified_gmt":"2018-09-25T02:54:04","slug":"need-answer-of-very-basic-questions-what-is-back-flow-in-fluent-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/need-answer-of-very-basic-questions-what-is-back-flow-in-fluent-simulation\/","title":{"rendered":"Need answer of very basic questions: What is back flow in Fluent simulation?"},"content":{"rendered":"<p>I need to clear the concepts about some simple questions:<\/p>\n<p><\/p>\n<p>1. What does back flow mean in Fluent?<\/p>\n<p><\/p>\n<p>2. What is Back flow volume fraction for VOF model?<\/p>\n<p><\/p>\n<p>3. In my simulation, more mass is going out through outlet than inlet. I have set velocity inlet = 553 m\/s. At pressure outlet, Gauge pressure = 0 atm. Operating pressure = 1 atm.<\/p>\n<p><\/p>\n<p>If I set Gauge pressure = 2atm (greater than operating pressure) then mass flow through outlet will decrease, right?<\/p>\n<p><\/p>\n<p>4. For two phase, I am selecting water by marking region. How can I know the volume fraction of water in the domain?<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>regards,<\/p>\n<p><\/p>\n<p>Raju.<\/p>\n","protected":false},"template":"","class_list":["post-30574","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["2746"],"_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":["1","1","1","1","1"],"_btv_view_count":["9459"],"_bbp_subscription":["1956","184890","66604","199842"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["30574"],"_bbp_forum_id":["27792"],"_bbp_engagement":["66604","157272","157874","184890","199842"],"_bbp_voice_count":["5"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["281096"],"_bbp_last_active_id":["281096"],"_bbp_last_active_time":["2023-04-25 11:21:51"]},"test":"rumth"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30574","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\/30574\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=30574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}