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Jing June 20, 2003 04:19

Pressure defination in subsonic flowfield
 
I calculate a subsonic flowfield with two inlets and one outlet. I use the Inlet BC at two inlets and Pressure BC at the outlet. The resulted flow field has a corrected pressure value at the outlet but not at the inlet. But in the subsonic flowfield, the pressure at the outlet should not have influence to the whole flowfield.

If I use the Outlet BC at the outlet, and Inlet BC at two inlets, the calculation divergence.

What is the reason for that?

Thanks!


4xF June 20, 2003 12:38

Re: Pressure defination in subsonic flowfield
 
Is your simulation transient or steady-state?

Alexey June 21, 2003 06:18

Re: Pressure defination in subsonic flowfield
 
For subsonic flows (M<1) flow disturbance may extend upstream, so it may influence to the whole flowfield. For supersonic flows (M>1) flow disturbance may extend upstream only in boundary layer (where M<1).

Maybe you have strong reverse flows at the outlet, that isn`t correct...

Jing June 23, 2003 02:57

Re: Pressure defination in subsonic flowfield
 
I have a steady-state simulation.

Thanks!


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