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SST turbulence model and transition

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Old   February 5, 2010, 23:51
Default SST turbulence model and transition
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Hi,

I would just like to confirm that when one sets the SST transitional turbulence to 'fully turbulent', the boundary layer is set to be entirely a turbulent boundary layer. I don't see this stated explicitly in the manual, so I was just wondering if someone could confirm this is true.

Thanks
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Old   February 7, 2010, 15:13
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Hi,

If you select the fully turbulent option, CFX will not solve the two extra transport equations, intermittency and transition Re, and it will act like other turbulence models, assuming flow is turbulent everywhere (except laminar sub-layer, if you use enhanced wall treatment).

I hope this answers your question.
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Old   March 12, 2014, 20:45
Default Difference in default SST and SST fully turbulence model
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Quote:
Originally Posted by triple_r View Post
Hi,

If you select the fully turbulent option, CFX will not solve the two extra transport equations, intermittency and transition Re, and it will act like other turbulence models, assuming flow is turbulent everywhere (except laminar sub-layer, if you use enhanced wall treatment).

I hope this answers your question.
Sorry to bring this old thread up again.
I have exactly the same question in mind.

So having fully turbulence turned on under transitional turbulence of SST model is same as having a default SST turbulence model (without activating transitional turbulence option) - the two-equation eddy-viscosity mode. Is this correct?

Cheers
Tom
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Old   March 12, 2014, 22:57
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Glenn Horrocks
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That is certainly the intention. I would check the modelled equations in the documentation to see if there is any mathematical difference however.
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Old   March 12, 2014, 23:36
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Originally Posted by ghorrocks View Post
That is certainly the intention. I would check the modelled equations in the documentation to see if there is any mathematical difference however.
Thanks, Glenn
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