[AEAli]

Hello all,

I am running a jet flow from a nozzle simulation, where I am interested in turbulence measurements of the jet flow outside the nozzle. However, I need to capture the wall effect as it influences the development of the shear layer in the jet. I am running my simulation with LES and using the recommended Werner & Wengle model, but I just need any recommendations for the targeted y+ value, if applicable.

Best,

[xieshengbai]

Hello,

For LES with the Werner-Wengle model, actually there is no recommended range of y+, as long as the first cell is not beyond the inertial subrange. The upper limit of the inertial subrange is flow-condition dependent (i.e., it increases with the Reynolds number), but roughly speaking, for an industrial spray case, it is fine to have y+ about O(100). However, it is always a good idea to have a grid sensitivity test.

I hope it is helpful.

Originally Posted by AEAli

Hello all,

I am running a jet flow from a nozzle simulation, where I am interested in turbulence measurements of the jet flow outside the nozzle. However, I need to capture the wall effect as it influences the development of the shear layer in the jet. I am running my simulation with LES and using the recommended Werner & Wengle model, but I just need any recommendations for the targeted y+ value, if applicable.

Best,