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Compressible Turbulence Model Implementations

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Old   April 17, 2007, 02:50
Default G'day. I am realtively new to
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Shaun Darmody
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G'day. I am realtively new to OF so please excuse me if this is an ignorant question. Why does the OpenFoam code not include for example the S-A and SST-KW models as options for when wanting to run a compressible flow field solution?

Am I missing something about the difficulty for the implementation of such an option?

I am not trying to criticise the code developers. I am simply curious as to why this (up until now) has not been done. I would have thought this would make OpenFoam extremely competitive amongst the available CFD codes for external aerodynamic applications.

I guess I am just putting this out there and wish to know if anyone has already made available the ability to select S-A or SST-KW for compressible flow fields.

Thanks for your time.

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Shaun.D
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Old   April 17, 2007, 04:55
Default Why would you need a compressi
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Eugene de Villiers
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Why would you need a compressible solver for external aerodynamics? (Ma ~ 0.1 = not compressible)

You are right it wouldn't be very hard to do though.
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Old   April 17, 2007, 07:49
Default Eugene, thanks for the reply.
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Shaun Darmody
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Eugene, thanks for the reply. I am talking about external aerodynamics applications where I would consistently model flows from M0.4 up to M1.2 for instance. Hence the need for a compressible flow field solution.

Can you or anyone else suggest the requirements for implementing a compressible flow compatible S-A and SST-KW model? Or should I simply plug away at this myself, by perhaps looking to the template offered for a compressible model in the source code?

Thanks again for your time.

Regards

Shaun.D
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Old   April 17, 2007, 08:28
Default For transonic flows you really
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Eugene de Villiers
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For transonic flows you really need to incorporate the effect of shocks on turbulence. To my knowledge none of the currently implemented turbulence models do this. Other than this, it should be fairly easy to make the incompressible models compressible by looking at the existing implementations.

Mail me if you have specific queries.
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Old   October 21, 2009, 11:55
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Nat Trask
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This thread was posted a while ago... do any of the newly incorporated turbulence models capture the effect of shocks on the turbulence?

-Nat
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