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Pressure defination in subsonic flowfield

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Old   June 20, 2003, 04:19
Default Pressure defination in subsonic flowfield
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Jing
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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!

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Old   June 20, 2003, 12:38
Default Re: Pressure defination in subsonic flowfield
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4xF
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Is your simulation transient or steady-state?
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Old   June 21, 2003, 06:18
Default Re: Pressure defination in subsonic flowfield
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Alexey
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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...
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Old   June 23, 2003, 02:57
Default Re: Pressure defination in subsonic flowfield
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Jing
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I have a steady-state simulation.

Thanks!
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