Boundary Layer? -- CFD Online Discussion Forums

September 17, 2003, 12:27	Boundary Layer?	#1
P.I Guest Posts: n/a	Hi, I want to model a cyclone seperating devise but I am having a few concerns about the grid that I have generated. (Gambit v.2.1.6). My real concern is to do with the boundary layer on the walls. I understand that by using normal wall functions, the Y+ value should be between 30 and 60, however, how do I go about generating a good initial approximation on how fine the grid at the wall should be? Thanks P.I

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