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Kimiaghalam
Posts: 1
Registered: ‎10-01-2012

Pressure Drop Calculation

192 Views, 1 Replies
10-01-2012 03:02 PM

I had a problem simulating pressure drop in a valve body. I have developed two cases for this problem, in one of them I am giving inlet pressure and outlet velocity and in the other one inlet velocity and pressure with inlet/outlet boundary condition at outlet. In the first case, the calculated outlet pressure is -23058 psi and in the second case the outlet pressure is 0 psi. I was expecting the same results in both cases. Attached you can find the report for these two cases. Please let me know what I am doing wrong. Thank you so much

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Valued Mentor
AstroJohnPE
Posts: 498
Registered: ‎08-30-2012

Re: Pressure Drop Calculation

10-02-2012 03:23 PM in reply to: Kimiaghalam

Hi,

 

I just have a few minutes to reply. What you should be checking is the pressure drop between the inlet and the outlet. Theoretically, you get the same flow rate if the inlet and outlet pressures are 0 and -10 as compared to 10000 and 9990.

 

John Holtz, PE
Mechanical Engineer
Pittsburgh, PA

16 years experience with Simulation Mechanical
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