# Pressure loss

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 February 26, 2008, 05:39 Pressure loss #1 rns Guest   Posts: n/a Sponsored Links 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-->
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 February 26, 2008, 07:58 Re: Pressure loss #2 Magnoli Guest   Posts: n/a 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.

 February 26, 2008, 17:52 Re: Pressure loss #3 CycLone Guest   Posts: n/a 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

 February 27, 2008, 05:13 Re: Pressure loss #4 Magnoli Guest   Posts: n/a 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.

 February 28, 2008, 14:38 Re: Pressure loss #5 CycLone Guest   Posts: n/a 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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