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Forum: OpenFOAM Running, Solving & CFD

October 24, 2006, 09:05

Replies: 6

Strange epsilon

Views: 1,474

Posted By chris1980

What is resonable choice for e

What is resonable choice for epsilon (I use the compressible RNG-k-epilon model) in the case of no initial turbulence (i.e. k=1e-8)?

Forum: OpenFOAM Running, Solving & CFD

September 13, 2006, 09:03

Replies: 6

Strange epsilon

Views: 1,474

Posted By chris1980

ok but the same case running w

ok but the same case running with star give me averaged epsilons from 2000..6000! So I don't know where the big difference gomes into the game http://www.cfd-online.com/OpenFOAM_Discus/clipart/sad.gif

Forum: OpenFOAM Running, Solving & CFD

September 13, 2006, 06:12

Replies: 6

Strange epsilon

Views: 1,474

Posted By chris1980

Hrv, I think a velocity flu

Hrv,

I think a velocity fluctuation of 3.5 m/s corresponds not to k=9.4 m^2/s^2, instead a fluctuation of 2.52 m/s is right.

Do you agree ?

The turbulence data (velocity fluctuation,...

Forum: OpenFOAM Running, Solving & CFD

September 13, 2006, 03:23

Replies: 6

Strange epsilon

Views: 1,474

Posted By chris1980

I am running a simulation with

I am running a simulation with the standart k-epsilon model. I have specified an initial condition for k=9.5 and epsilon=1750. However the volume averaged epsilon after the first time step is...

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