{"id":251771,"date":"2023-02-27T17:16:05","date_gmt":"2023-02-27T17:16:05","guid":{"rendered":"\/forum\/forums\/topic\/measuring-mass-flow-rate-through-a-surface\/"},"modified":"2023-02-27T17:33:03","modified_gmt":"2023-02-27T17:33:03","slug":"measuring-mass-flow-rate-through-a-surface","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/measuring-mass-flow-rate-through-a-surface\/","title":{"rendered":"Measuring mass flow rate through a surface"},"content":{"rendered":"

Hi there!<\/p>\n

I am currently performing a 3D analysis of a Formula Student car. The objective is to measure the air mass flow rate that passes through the sidepods, so I have created a surface at the sidepod entry and I have defined a Surface -> Mass Flow Rate report on that surface.<\/p>\n

The X velocity contour can be seen in the attached picture (I have assumed that the dark spots are just a visual glitch, but maybe I’m wrong). The area of the surface is around 0.1 m2. So according to my calculations the mass flow rate through it should be around 1 kg\/s.<\/p>\n

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

 <\/p>\n

However, as seen in the next picture, the resulting mass flow rate varies between 0.015 and 0.025 kg\/s.<\/p>\n

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

Am I doing something wrong? Is this mass flow rate measuring method incorrect?<\/p>\n

I would appreciate any help. Thank you in advance.<\/p>\n

Kind regards!<\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-251771","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["61360","199"],"_bbp_author_ip":["23.220.96.181"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["658"],"_edit_lock":["1677519086:199902"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["251771"],"_bbp_forum_id":["27792"],"_bbp_engagement":["199","61360"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["251899"],"_bbp_last_active_id":["251899"],"_bbp_last_active_time":["2023-02-28 11:20:38"]},"test":"fernando-hernandez-alonsoalumnos-upm-es"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/251771","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\/251771\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=251771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}