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-   -   how yPlus can affect the result? (http://www.cfd-online.com/Forums/cfx/71629-how-yplus-can-affect-result.html)

zandi January 9, 2010 16:02

how yPlus can affect the result?
 
hi
I use k-epsilon for my problem in cfx
I want to know if the yplus goes under 20 (as the limit of the parameter in this turbulent model), all of the simulation would be failed?
I don't want to check the parameters near the walls but I want to make meshes finner because the tangentical velocity vectors in the sections change due to this refining (the view of them).
I would appreciate your consult.

Tristan January 11, 2010 12:54

Having y+ values less than twenty will not cause the simulation to fail. See the discussion of scalable wall functions in the ANSYS CFX-Solver Theory Guide for more detail on how CFX handles the near wall region with wall functions.

Tristan

zandi January 14, 2010 03:09

Quote:

Originally Posted by Tristan (Post 242183)
Having y+ values less than twenty will not cause the simulation to fail. See the discussion of scalable wall functions in the ANSYS CFX-Solver Theory Guide for more detail on how CFX handles the near wall region with wall functions.

Tristan


thank you very much


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