[nicola_78]

Hi everybody!

I have a straight pipe with in the middle of it a certain pressure loss.

I'd like to know the pressure drop between inlet-outlet: for this purpose I impose the difference between static pressure at the inlet and static pressure at the outlet, I think it's correct this way.

My question is this one: out of curiosity I impose also the difference between total pressure at the inlet and total pressure at the outlet, shouldn't it be 0 more or less? It'n not 0 in my simulation.

Thanks

[FMDenaro]

Originally Posted by nicola_78

Hi everybody!

I have a straight pipe with in the middle of it a certain pressure loss.

I'd like to know the pressure drop between inlet-outlet: for this purpose I impose the difference between static pressure at the inlet and static pressure at the outlet, I think it's correct this way.

My question is this one: out of curiosity I impose also the difference between total pressure at the inlet and total pressure at the outlet, shouldn't it be 0 more or less? It'n not 0 in my simulation.

Thanks

total pressure is invariant only for isoentropic flows.... by action of the viscosity the level of p0 decreases due to increase in entropy