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-   -   yPlus function object and transitional turbulence models (https://www.cfd-online.com/Forums/openfoam-post-processing/225433-yplus-function-object-transitional-turbulence-models.html)

gflorent March 26, 2020 11:33

yPlus function object and transitional turbulence models
 
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Hello,


I am simulating the flow (1.096 m/s) of water around an axisymmetric body (L=0.37 m) using the kOmegaSSTLM and kkLOmega models. I am therefore aiming to get a first BL layer close to Y+=1. Using my own calculator or the online calculator here, I get to the conclusion that my the first layer of my mesh should be around 2e-5 [m] thick. I have no problem generating such a mesh with an hyperbolic mesher and the 2e-5 [m] thickness is enforced over the whole body.
Yet, after solving and converging to realistic results, the yPlus function object of OpenFOAM (1912) yields values that are well below 1 (3.1 e-4 to 4.6e-2) on the body.


What am I missing here?


Cheers.


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