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Olivier Macchion December 11, 2002 11:01

pressure losses
 
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

cfd guy December 11, 2002 15:25

Re: pressure losses
 
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

Olivier Macchion December 12, 2002 03:51

Re: pressure losses
 
Thank you cfd guy !

Olivier

Jan Rusås December 12, 2002 07:39

Re: pressure losses
 
I do think it should be mass average when dealing with pressure loss? Regards Jan

Swapnil December 12, 2002 12:30

Re: pressure losses
 
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

Jan Rusås December 13, 2002 05:43

Re: pressure losses
 
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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