{"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

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 <\/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

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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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t