Wall Y+
 

Hello all,

In order to increase the wall Y+ value, i did boundray adaption. BUT, the results turn out to be less accurate than without having the adaption. Which means, without adaption, my results is OK. What does this mean? Does it mean I dun have to decrease the value of Y+ even though in it quite high?

Thanks.

Sham.

Re: Wall Y+
 

Are you using Std Wall Fn or Enh Wall Tr?

Re: Wall Y+
 

It is enhanced wall function.

Thanks.

Re: Wall Y+
 

What is your domain (geometry)?

Re: Wall Y+
 

I have arectangular domain with a cylinder sitting on the bottom. It is about 66000 cells.

thanks.

Sham.

Re: Wall Y+
 

You need Y+ of order 1-5. What is the value before adaptation?

Re: Wall Y+
 

It is of the order around 1000. But I dunno how many times whould I adapt boundary to bring down the values to 1-5.

Re: Wall Y+
 

Did you try placing your first grid point using http://geolab.larc.nasa.gov/APPS/YPlus/

Re: Wall Y+
 

can you pls tell me hwo can I do that in Gambit?

Sham.