Questions about wall function -- CFD Online Discussion Forums

October 10, 2004, 23:23	Questions about wall function	#1
sarah_ron Guest Posts: n/a	Dear all, When wall function is used in turbulence models, it is suggested y+ is about 30. This point is easy to understand. But in "10.9.1 Near-Wall Mesh Guidelines for Wall Functions", the following statement is difficult for me to understand It is important to have at least a few cells inside the boundary layer. The height of boundary layer is always not known beforehand for many complex turbulence flows. So I am quite confused about this. Any response is warmly welcomed. Thanks a lot! sarah

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