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-   -   RNG k-e & Diesel simulation (http://www.cfd-online.com/Forums/cd-adapco/52645-rng-k-e-diesel-simulation.html)

Ossi August 10, 2001 13:25

RNG k-e & Diesel simulation
 
Hi,

is anybody experienced with the RNG k-e turbulence model in conjuction with Diesel engines ?

Especially I am interested if someone has changed STAR-CD's default coefficients of the RNG model and the effect of that to the results.

At least in KIVA the coefficient C4 (C3 in 'KIVA language') is not a constant but varying according to the velocity divergence. I have also noticed that the default constants in STAR-CD produce very low turbulent viscosity which, in some cases, deteriorate the results when compared to the standard k-e model.


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