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Forum: OpenFOAM Running, Solving & CFD

January 20, 2016, 16:48

Replies: 21

zero gradient pressure B/C

Views: 17,724

Posted By murx

Actually, if you look at the boundary layer...

Actually, if you look at the boundary layer equations by Prandtl (which I guess should be valid for laminar flow), you can see that they even explicitly state that dp/dy = 0 in the whole boundary...

Forum: OpenFOAM Running, Solving & CFD

January 20, 2016, 13:23

Replies: 21

zero gradient pressure B/C

Views: 17,724

Posted By murx

I am not an expert in turbulence, but I think you...

I am not an expert in turbulence, but I think you are right about the vertical velocity component. It should be zero in the sublayer. And because of this, the second derivative should also be zero....

Forum: OpenFOAM Running, Solving & CFD

January 20, 2016, 12:05

Replies: 21

zero gradient pressure B/C

Views: 17,724

Posted By murx

You are now bringing turbulence into the problem,...

You are now bringing turbulence into the problem, which will not make this more easy to solve :) However, the linear velocity profile in the viscous sublayer of turbulent flows refers to the parallel...

Forum: OpenFOAM Running, Solving & CFD

July 28, 2015, 11:02

Replies: 21

zero gradient pressure B/C

Views: 17,724

Posted By murx

Sorry to open this thread again. But this is...

Sorry to open this thread again. But this is exactly what I was asking myself: dv/dy = 0 => d2v/dy2 = 0 ...why?

I was really happy to find a such a simple answer to this question but I actually...

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