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Old   February 26, 2008, 05:39
Default Pressure loss
  #1
rns
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Hi, In calculation of pressure loss between inlet and outlet, is it correct to take the difference between areaAve-->Pressure-->Outlet and areaAve-->Pressure-->Inlet directly from the CFX-Post.

It will be nice to provide information about areaAve, massflowAve... in CFXPost

Thanks in advance.

regards RNSareaAve-->Pressure--><Outlet
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Old   February 26, 2008, 07:58
Default Re: Pressure loss
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Magnoli
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Hi, It depends on what you want to evaluate. If you just want to calculate the average pressure gradient between inlet and outlet, that is ok. But it is more common that one wants to determine the head loss, than you should take the "total pressure" difference instead of the simple pressure difference and divide it by the appropriate constants, to get it in the units you prefer. Magnoli.
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Old   February 26, 2008, 17:52
Default Re: Pressure loss
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CycLone
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RNS: The mass ave and area ave functions are both described in the Post documentation. How to use them is up to you.

Magnoli: You don't need to divide by anything to get the units you want, just change your unit display preferences in the CFX-Post options (Edit>Options...).

-CycLone
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Old   February 27, 2008, 05:13
Default Re: Pressure loss
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Magnoli
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Hi CycLone, in fact I was not clear in what I meant. I was telling about, instead of having the head loss in [Pa], having it in [mWC] for example, and then density and gravity are involved.
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Old   February 28, 2008, 14:38
Default Re: Pressure loss
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CycLone
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You can still do this. Just go to the unit options panel and choose "Custom". For the pressure, enter [m Wg] (or [m water]) as the desired pressure unit.

-CycLone
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