YPlus value for SST

Ed Mueller

Hello all,

I am fairly new to CFX and I have a question about the y-plus value of my mesh. I am using SST turbulence model with automatic wall function. I am wondering what y-plus value to use.

I have searched the forums and I see people who have recommended varyin values for Y+--anything from under 2 to under 200. The CFX help suggests DELTA Y+ of less than 2--how can I relate delta Y+ to Y+?

Also, when it suggests minimum number of nodes is at least 10, does this mean I need 10 prisms on my boundary layer?

Finally, is there an easy way to get an estimate on Y+ without creating a contour plot of it after my model has solved?

For what it's worth, my application is to study cavitation in a water pump.

Any help anyone can give will be greatly appreciated.

Thanks, Ed