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OpenFOAM: Variable Turbulent Prandtl Number

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Old   May 18, 2021, 05:07
Default OpenFOAM: Variable Turbulent Prandtl Number
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priyesh kakka
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Hello,

I had modified the OpenFOAM solver to see the effects of turbulent Prandtl numbers on the heat transfer near the wall (dynamic Smagorinsky | LES). For incompressible solver, OpenFOAM keeps turbulent Prandtl number as constant, hence energy equation solved is not truly dynamic. I calculated turbulent Prandtl number using test filters similar to dynamic models referring to Lilly's paper of 1992. Here, the turbulent Prandtl number is calculated at every timestep, and it influences the energy equation.

Please find the solver Github link for more details:
https://github.com/kakkapriyesh/Vari...umber_OpenFOAM

I hope this code is useful to someone!

Last edited by kakkapriyesh; May 20, 2021 at 23:55. Reason: Forgot to mention, this is for LES (dynamic smagorinsky)
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heat and mass transfer, openfoam, prandtl number, turbulence and laminar

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