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November 13, 2013, 07:47 |
Total pressure boundary condition
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#1 |
Member
Luca
Join Date: Mar 2013
Posts: 68
Rep Power: 13 |
Hi everybody,
I'm looking for a way to impose the total pressure as inlet boundary condition, instead than a velocity. My first try was to set the inlet with a fixedValue in both pressure and velocity, but this way the simulation gives bad results: even if i'm working with an incompressible flow, the flow rate decrease during the simulation. This should be obviously impossible in incompressible flow, but it happens. After some research I found a pressure boundary condition called, indeed, totalPressure. http://www.openfoam.org/docs/cpp/ Code:
myPatch { type totalPressure; U U; phi phi; rho none; psi none; gamma 1.4; p0 uniform 1e5; } What kind of BC do I have to set in the U file? Do you have other advices about this topic? Thank you very much, Luca |
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December 4, 2013, 05:19 |
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#2 |
Member
Thangam Natarajan
Join Date: Dec 2010
Location: Perth
Posts: 70
Rep Power: 16 |
for a start you may want to look at pressureInletOutletVelocity b.c for your velocity at the outlet...I guess this is self adapting based on the pressure...I guess some more details on the case could be more helpful...
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Tags |
boundaries condition, inlet boundary condition, pressure bc, total pressure |
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