K-E vs RNG Turbulent MOdel
 

All Can any one advice which turbulent models (K-e vs RNG) is suitable to use for highly turbulent flow? and what is the pro and con's?

Re: K-E vs RNG Turbulent MOdel
 

RNG k-e model is preferable. It better handles transitional flows and different turbulent length scales. The main difference from the standard k-e model is that some coefficients that are constants in the standard model are functions of the flow parameters in the RNG model.

Michael

Re: K-E vs RNG Turbulent MOdel
 

Michael So is that mean RNG K-e is more stable turbulent model to use?

Re: K-E vs RNG Turbulent MOdel
 

CK,

What do you mean by more stable?

Re: K-E vs RNG Turbulent MOdel
 

Michael it is refer to free from convergence issue & produce correct results. so is RNG better than standard k-e turbulent model?

Re: K-E vs RNG Turbulent MOdel
 

Yes, I think, the RNG model is better in that it better accounts for turbulence, but both models are equally stable.

Re: K-E vs RNG Turbulent MOdel
 

Michael Thanks for feedback. :)