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Species (molecular) properties in fully turbulent flow

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Old   October 17, 2012, 09:33
Default Species (molecular) properties in fully turbulent flow
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Hi all,

I would just like to hear about you opinion on how important it is to specify molecular properties (specific heat, thermal conductivity and viscosity) in fully turbulent flow when using eddy-viscosity (RANS) models.

In my opinion, thermal conductivity and viscosity have little importance, as the turbulent values exceed the molecular properties a multiple times.

Specific heat, however, still remains important, as the turbulent mixing does not primarily affect the heating rate (although eddy dissipation heats the fluid).

Thanks for your comments.
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