how many points to resolve a boundary layer?
Does anybody know what is the minimal number of grid points to resolve a boundary layer? Is there any general method/rationale/experience to determine this?
Thanks, Jiaying 
Re: how many points to resolve a boundary layer?
Sorry, forgot to mention that I am going to use FVM with LRN ke turbulence models.
The problem is threedimensional, but I am asking how many points along the wallnormal direction needed to resolve a bounday layer, to calculate flow friction and heat transfer. Let's assume the geometry is not that complicate (say, a flat plate). Thanks, Jiaying 
Re: how many points to resolve a boundary layer?
Hi,
According to the Star manual it is recommended to use at least 20 boundary layers with a y+ value of app. 1 near the wall. Regards, Volker 
Re: how many points to resolve a boundary layer?
heat transfer  so the thermal boundary layer. while resolving the bl one should take care of the prandtl number  or not?

Re: how many points to resolve a boundary layer?
Please have a look at "numerical computation of Internal and external flows" by C. Hirsch. I think you will have a general idea.

Re: how many points to resolve a boundary layer?

Re: how many points to resolve a boundary layer?
Thanks, I'll search for that.

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