How to decide the boundary condition for free surface?
Hi
I know that at the bottom we can use the wall function to determine the BC for turbulent kinetic energy k and dissipation e. So how about the free surface? Does the wall function still apply to free surface or we can use something else? Thank you in advance |
at the free surface the velocity vector normal to the free surface is zero and the zero gradient is applied for tangential velocity vector.
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Thank you for your explainnation.
I know how to set velocity at the free surface. I mean, at present i used k-e model to simulate the turbulence. I want to know how to set k and e at the free surface. |
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I have got it
Thank you again |
Hi...
I am a bit confused about how to specify boundary condition for the top surface. I have seen many ppl set the surface as symmetry. I am wondering when such boundary condition can be applied and when do we need to use other types of boundary conditions? Specifically, if we are modeling the flow crossing a weir, what type of boundary condition should I specify for the top surface (both in front and after the weir)... Thanks! |
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