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Morshed Alam February 18, 2009 23:56

Turbulence modelling
 
Which turbulence model is suitable for simulating high temperature(1000K) supersonic flow? I am using K-epsilon now. But it is underpredicting the axial velocity and mach number.

Morshed

Harish February 20, 2009 12:16

Re: Turbulence modelling
 
Which K-epsilon model are you employing ? If it is some recent model and its not performing well, try the K-omega family of models.

JK February 21, 2009 14:45

Re: Turbulence modelling
 
Also, not predicting the axial velocity can be related to a diffusive discretization scheme. If you're velocities are 'slowing' down more quickly than you would like along the axial direction, perhaps change the discretization from 2nd order to a compressive scheme (i.e. upwinding - which has its own diffusion problems).

Morshed Alam February 22, 2009 19:11

Re: Turbulence modelling
 
Thanks to both of you Harish and JK


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