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-   -   Boundary Layer Question (http://www.cfd-online.com/Forums/star-ccm/80529-boundary-layer-question.html)

scottneh September 28, 2010 19:38

Boundary Layer Question
 
Hello,

I am using Star CCM+ 5.04 and I am trying to simulate a boundary layer over a flat plate with a wedge in the middle. I would like to have an accurate simulation of the boundary layer and how to build the boundary layer. I see that I have to input the height of the boundary layer and the number of layers but I really don't know what the real boundary layer would look like if I built the model and put it in a wind tunnel.

Can anyone offer any insight into how one goes about selecting these parameters?

Thanks
Scott

nomad September 30, 2010 13:50

I would setup an initial arbitrary mesh, sun the simulation, look at what's happening to the flow, then remesh accordingly depending on what flow structure develops where.

scottneh September 30, 2010 13:56

An arbitrary mesh for where I think the boundary layer is? I have a mesh for the overall flow volume. Would I turn on the prism layer and define arbitrary thickness and number of layers?

Thanks
Scott

nomad September 30, 2010 14:21

Yes, start with a few prism layers covering the edges and intersections of the wedge and the plate, then add or refine the prism layers as necessary.


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