yplus at high Re
 

I am dealing with a high pressure(250 bar, 600-800K temp) supercritical water flow through a channel. i want to know, what will be the range of y plus at Re(50000 to 70000). thanks

Re: yplus at high Re
 

Y+ is grid dependent.

Re: yplus at high Re
 

in my case, mesh is corse with boundary layers not much refinement at the wall. using k-epsilon model with scalable wall functions. after postprocessing the results i got yplus in the range of 2000 to 2500. i dont know it is correct or not. local Re is in the range of 50000 to 70000

Re: yplus at high Re
 

Hi,

Do a mesh sensitivity check to determine if this y+ value is OK.

Glenn Horrocks

Re: yplus at high Re
 

thanks glenn and john

Re: yplus at high Re
 

I think you really need to make hybrid mesh . It seems from your values of Y plus, you don`t have one, any ways try to get a bit closer to the wall, determine your first cell height some iterative procedure,

I am sure you will get good results