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Old   December 11, 2002, 11:01
Default pressure losses
  #1
Olivier Macchion
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Hello

I would like to calculate the pressure losses and the crossflow intensity in a duct. Does anybody know how to do this in POST ?

Thanks

MvH

Olivier
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Old   December 11, 2002, 15:25
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cfd guy
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To evaluate the pressure drop (global) use the calculator function in POST. Calculate the area average pressure of the inlet and subtract this value with the one found on the outlet (assuming you have only one inlet and one outlet).
cfd guy
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Old   December 12, 2002, 03:51
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Olivier Macchion
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Thank you cfd guy !

Olivier
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Old   December 12, 2002, 07:39
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Jan Rusås
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I do think it should be mass average when dealing with pressure loss? Regards Jan
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Old   December 12, 2002, 12:30
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Swapnil
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Hi Olivier,

Will you please describe in brief the problem statement/phenomena you are studying? I am also working on a problem which is closely related to cross flow in ducts . Let me know.

Also, if there is any body else who has worked on problem similar to this please post a brief description of your problem statement

Thanks,

Swapnil
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Old   December 13, 2002, 05:43
Default Re: pressure losses
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Jan Rusås
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I would like to make a small correction. The total pressure loss is a energy loss and should therefore, when calculated be wolume flow averaged, (omitting internal energy and potential energy)

Intergral (p+ 1/2*rho*U^2)U dA at position 1 and 2.

In case of incompressible flow mass flow averaged can be used. Regards Jan

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