CMS-Flow Eddy Viscosity

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Eddy Viscosity

Eddy Viscosity in CMS-Flow is not a user definable parameter. A description of the advanced cards related to eddy viscosity is shown in the table below.


Card Arguments Default Range Description Versions
TURBULENCE_MODEL CHARACTER SUBGRID SUBGRID |FALCONER| PARABOLIC | MIXING-LENGTH Specifies the turbulence model used >=3.5
EDDY_VISCOSITY_CONSTANT REAL 1.0E-6 >=1.0E-6 Constant contribution or base value of eddy viscosity >=3.5
EDDY_VISCOSITY_BOTTOM REAL 0.0667 0.01-0.2 Coefficient related to the contribution to eddy viscosity from the bottom shear >=3.5
EDDY_VISCOSITY_HORIZONTAL REAL 0.4 0.2-0.6 Coefficient related to the contribution to eddy viscosity from horizontal velocity gradients >=3.5
EDDY_VISCOSITY_WAVE REAL 0.5 0.2-1.0 Coefficient related to the wave bottom friction contribution to eddy viscosity >=4.0
EDDY_VISCOSITY_BREAKING REAL 0.05 0.04-0.08 Coefficient related to the wave breaking contribution to eddy viscosity >=4.0

More information can be found here.

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