2 Replies Latest reply on Oct 12, 2015 8:24 AM by Amit Katz

Total Pressure or Static Pressure ?

Avinash Monthero Oct 12, 2015 1:02 AM

If i measure pressure at inlet pipe by gauge as say 200psig ( absolute pressure = 200+14.7 = 214.7 psia )

So in my flow simulation should i consider static pressure = 214.7 psi or Total pressure = 214.7 psi ?

Also please explain the reason .

Re: Total Pressure or Static Pressure ?

Jet Lim Oct 12, 2015 6:01 AM (in response to Avinash Monthero)

I believe it should be Static Pressure. As absolute pressure is the absolute static pressure
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Re: Total Pressure or Static Pressure ?

Amit Katz Oct 12, 2015 8:24 AM (in response to Avinash Monthero)

If you measured 200PSIg as the static pressure, then use that in your simulation. You didn't measure the absolute pressure, so you don't know what it is.

Total pressure = static pressure + dynamic pressure. If you input 214.7PSI as your total pressure, you will lose mechanical potential energy, as your total pressure is in fact much higher, assuming your fluid isn't stagnant.
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