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Old   April 21, 2008, 19:21
Default whistling through a pipe
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cfd-student
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Hi guys

I wanna whistle through a pipe and analyse the acoustical behaviour. What sort of boundary conditions i would need to do that. How much pressure do you recommend I should apply at the inlet.

Can you please direct me to any reading material on the subject. Thank you
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Old   April 22, 2008, 12:33
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Tim
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Interesting question. You suck a lot more powerfully than you blow. I think that humans can draw about 5" of mercury vacuum, and blow about 1/2 psi pressure. Haven't blown on an anemometer lately, but a velociy boundary condition on the order of 1 m/s seems about right also.
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Old   April 22, 2008, 16:15
Default Re: whistling through a pipe
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cfd-student
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Thank you tim. I was thinking I should have pressure inlet at the inlet and specify a value for pressure. I am totally confused. How do I whistle through pipe guys??
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Old   April 23, 2008, 07:14
Default Re: whistling through a pipe
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Tim
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If you have a need for pressure inlet, but do not know the pressure, you could run a test case where you specify the velocity and calculate the pressure drop.
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Old   April 23, 2008, 10:53
Default Re: whistling through a pipe
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true. Thanks tim
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