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Please advise on the Duct boundary conditions.

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Old   March 3, 2024, 07:55
Default Please advise on the Duct boundary conditions.
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I am a student studying CFD basic knowledge. I am studying background knowledge. I would appreciate it if you could show me a picture or picture of how the boundary conditions are to interpret the problem below

I'd like to interpret Duct, but I'm a beginner, so I don't know what to do with the boundary conditions.
I would like to interpret it as the problem below.
Q. There is a 200A circular duct. The right end has 8m/s and 15CMM air volume because it is a mid-air exhaust. The left end is atmospheric.
What is the air volume on the left?

I wonder how to interpret the air volume in the boundary conditions of the problem.
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Old   March 13, 2024, 04:32
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Jon Wilde
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If you have a fixed velocity at the outlet, unless it changes density - you can assume the same at the inlet.
So inlet = 8 m/s
Outlet = your known pressure
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