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Prandtl's one-equation RAS turbulence model

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Old   April 3, 2013, 04:30
Default Prandtl's one-equation RAS turbulence model
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Julien
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Hi every Foamers,

I would like to run a steady-state external aerodynamics in Atmospheric Boundary Layer, using the Prandtl's one-equation model with L the mixing length being proportional to the wall distance (something similar to wallDist(mesh_) from LES PrandtlDelta ).
But I can't find any RAS turbulence models (incompressibleRASModels, Foam user guide p.U-100) corresponding! The unique 1 equation model is Spalart-Allmaras but seems very complicated for me.

Does anybody has already implemented the Prandtl's one-equation model for RAS incompressible model ? It seems quite simple to do so. Do you know why it has not been done within OpenFOAM ?
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Old   June 8, 2015, 15:16
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Searching for the same,
Any luck!?
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Old   June 9, 2015, 03:59
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Hi,

unfortunately, no. No answers, and I did not find. I know another software, Meteodyn WT, using this kind of turbulence modelling, but I wanted to make comparisons...
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Old   April 9, 2016, 06:30
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Hey guys,

Actually the Prandlt model can be implemented as the oneEqEddies in LES framework. The values of the length is based on the physical of the flows. Ck = 1, Ce = 0.08.

With verification, the turbulent kinetic energy is, as expected, the variance (as in RANS) and not the tke of the subgridscale (LES)
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