[mgdenno]

Hello All,

I have a question regarding boundary conditions for free surface (VOF) simulations using the interFoam solver (v1.7). This is my first real adventure into CFD - I am still learning. I am trying to set up and run a spillway validation case against the physical model results from the Army Corps of Engineers for a standard WES ogee spillway, as has been done with other commercial codes. So far I have successfully generated the mesh at a few different resolutions, and have been able to run the simulation and view the results for both laminar and RAS turbulence models. However, and this is where my question comes in, I have only been able to set up the case with a fixedVelocity inlet and zeroGradient outlet. This approach seems to be okay if the flow rate is known and the performance for that flow rate is needed. What I am having trouble figuring out is how to specify a fixed inlet water surface elevation boundary condition. I presume that it would be a pressure type boundary condition, but haven't had any success figuring it out.

Does anyone have any suggestions on how to set this up? I have searched extensively through the forums and have tried to look at the source code to figure it out without success.

Also I am in search of a good CFD reference to help me really understand the subject if anyone knows of one.

FYI - using the velocity inlet the results are quite good - I believe after some work with the boundary conditions the results will be very good.

Thanks,

Matt