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Hello
I need to simulate 3D flow through a small rectangular channel. I need to use 10 horizontal layers to simulate the flow.
The channel contains 4 sides where the top,bottom and the right hand sides are closed boundary.

The left hand side boundary IS open only for the 5th layer where i can give flowrate. The rest of the layer nodes are closed.

How to apply the boundary condition for this LEFT HAND SIDE BOUNDARY.

Thanks
vks

Hello,

You can try to impose a liquid boundary for the inlet and to edit/use as user_fortran the subroutines user_bord3d.f and user_mesh_transf.f.

user_mesh_transf.f: in order to prescribe elevation of layer 5 (and below layers)
user_bord3d.f: in order to impose 0 velocity at the inlet except for the layer 5.

Just to keep in mind: in some cases, it is not optimal to impose u,v,w = 0 on the wall, in case of turbulent flows for instance. This depends on your case.

Best regards

Thanks JacquesFontaine