backward facing step
 

Hello,
I want to simulate a backward facing step with transtional flow. I already simulated with KEpsilon an KOmega with wall function. The results were ok but now I want to simulate with low re model and a yplus value of 1. Is there a possibilty to switch for example komega to low reynolds model or do i have to use for example launderSharmaKE? And when I have to use LaunderSharma how to configure to get no wall treatment?
I'm using the simpleFoam solver!

Thanks