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Shuo September 18, 2008 20:53

TVD and turbulence models
 
Is it compatible to use a turbulence model with TVD schemes given that the latter is an inherently artificial viscosity method? I am trying to model a supersonic free jet using TVD schemes and the jet doesn't seem to decay.

Shuo

nd September 19, 2008 01:18

Re: TVD and turbulence models
 
may be it is doesn't satisfy entropy condition. use monotone

Shuo September 19, 2008 01:55

Re: TVD and turbulence models
 
you mean something like MUSCL?

nd September 19, 2008 09:57

Re: TVD and turbulence models
 
yup,

Axel Rohde September 19, 2008 21:40

Re: TVD and turbulence models
 
That is the correct result!! - TVD schemes have such low numerical viscosity that a shear layer will not develop if you are solving Euler only. I ran the same simulation (supersonic jet) several years ago while testing my TVD code to obtain a measure of its numerical viscosity, and I was very pleased with the result. An underlying TVD scheme is ideal for a compressible Navier Stokes code, because you see the effects of physical viscosity only.

shuo September 19, 2008 22:18

Re: TVD and turbulence models
 
Hi Axel

Is it Ok if I give you my email and ask a few questions regarding the problems that I have been having with my supersonic jet simulations?

Shuo

Axel Rohde September 20, 2008 07:30

Re: TVD and turbulence models
 
Sure! - Or contact me through my web site directly.


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