Dear all,
I try to use Ope
Dear all, I try to use OpenFOAM to study discharge capacity problem of a spillway. My problem is schematized as follow figure: http://www.cfd-online.com/OpenFOAM_D...ges/1/4875.gif In this 2D problem, the upstream water level, gate opening and downstream water are known. However, the discharge capacity is unknown, so that the inlet velocity can not be given. I setup the inlet and outlet with pressure inlet/outlet boundaries. But during the simulation, deta_T became smaller and smaller then equal 0! The simulation failed!! for 1~2 : pressureInlet gamma = fixedValue=1 velocity=pressureinletVelocity (I used 0) pd=fixValue (rho*H=constant or 0, both didn't work!) for 2~3 : pressureInlet gamma = fixedValue=1 velocity=pressureinletVelocity (I used 0) pd=fixValue (=0) for 4~5 pressureOutlet gamma= zeroGradient velocity=zeroGradient pd= fixedValue=0 for 5~6 pressureOutlet gamma= zeroGradient velocity=zeroGradient pd= fixedValue=0 However, I can do the simulation well with velocity inlet BC for 1~2 : Inlet gamma = fixedValue=1 velocity=inletVelocity pd=zeroGradient for 2~3 : Inlet gamma=fixedValue =0 velocity=inletVelocity=0 pd = zeroGradient for 4~5 PresureOutlet gamma=fixedValue =1 velocity=zeroGradient pd=zeroGradient for 5~6 PressureOutlet gamma=fixedValue=0 velocity=zeroGradient pd=zeroGradient It is highly appreciated for any comments or suggestion! Best Regards! Jack |
I forgot to mention that I use
I forgot to mention that I used interFoam solver.
Thanks, Jack |
Hello Jack,
I have a similar case. Can you tell me how you solve the problem? with best regards, rlobosco |
it seems like it's an outdated post, yet I know the answer, so contact me in case u need.
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Hi Siamak. What is the answer that you have for this problem?
Thanks! |
I am working on a similar problem, would be great if you could share the boundary conditions for U, p_rgh and alpha.water for this particular case. Thank You!
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