Re: Free-Slip Boundary Condition – Implementation Doubts
Hi Alejandro,rnrn
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It seems that “”advectionDiffusionBoundayPostProcessiorXD.h/hh”” it is only implemented in 3D, right?
rnThis is correct, but for 2D it should be possible to do an analogue implementation.rnrn
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the grad(U)*n = 0 (0 is the zero vector)
rnWasn’t that just what you wanted? In your first post you wrote:rn
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2. von Neumann boundary condition : The gradient of the velocity normal to the wall is zero
rnSo for free slip you want something similiar (replacing the vector n with a vector tangential to the surface), or am I wrong?rnrn
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it seems that the nodes residing in the overlap region could not be implemented as a Slip-Boundary-Condition. Does someone know how to “”fix”” or overcome this problem?
rnIf you refer to the “”could not add boundary”” messages in the beginning, this shouldn’t be a problem, since computations on the overlap are not required, hence no boundary condition has to be applied.rnrnBest regardsrnRobin