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Pressure driven flow interFoam (openchannel flow)

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Old   December 4, 2018, 09:53
Unhappy Pressure driven flow interFoam (openchannel flow)
Akshay Patil
Join Date: Nov 2015
Location: Pune, India
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Hello everyone,
I am currently working on an open channel flow problem (Check the case case.tgz).
The problem is I am not sure if the boundary conditions mentioned are appropriate. The current setup (see attchment) seems to have convergence issues. I am pretty sure it is the boundary conditions. I have not tried experimenting with any discretisation yet. I think the Mesh is okay.

The inflow at the inlet is not known, as a result some kind of pressure boundary condition should be used. However, I am not sure which BC applies in this case. There are two outlets in the domain.

As the inflow rate is unknown, I am utilising the pressureInletVelocity for "U" and zeroGradient for "p_rgh" at the inlet. At the outlet, I am using zeroGradient for "U" and zeroGradient for "p_rgh". I have tried a lot of other combinations of boundary conditions, however, nothing seems to be working.

The case can be downloaded from the link below :
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interfoam, open channel flow, pressure based solver

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