Hi I am trying to understan
 

Hi

I am trying to understand the turbulence models used by sonicTurbFoam
I found this wikipedia link for compressible turbulence and would like to know, why some terms are dropped in sonicTurbFoam.

http://www.cfd-online.com/Wiki/Favre_averaged_Navier-Stokes_equations#Closed_app roximated_equations

Right at the bottom, eqns 30-32 give the final expressions after averaging.
In sonicTurbFoam , for the energy equation, i find the term
fvm::laplacian(turbulence->alphaEff(), h)
What is alphaEff, does it account for the workdone by turbulent stresses on the surface and the turbulent heat transfer?

Thanks
Srinath