5.3.1 Definitions
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Turbulent Viscosity: The Turbulent Viscosity (
) is the eddy viscosity that effects turbulence. The unit for the Turbulent Viscosity is Pa-s.
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Turbulent Kinetic Energy: The Turbulent Kinetic Energy (
) is a measure of the fluctuations in the mainstream kinetic energy. The unit for the Turbulent Kinetic Energy is (m2/s2).
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where
the turbulent fluctuation velocity (m/s) The Turbulent Kinetic Energy term is calculated per unit mass (kg).
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Turbulent Energy Dissipation Rate: The Turbulent Energy Dissipation Rate (
) is a measure of the rate of dissipation of the Turbulent Kinetic Energy. The unit for Turbulent Energy Dissipation Rate is (m2/s3). 
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where
Strain tensor 
The components of the turbulent fluctuation velocity (m/s) -
Y Plus:
is a dimensionless wall distance used in the Log Law of the Wall model. 
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where
Density (kg/m3) 
Friction velocity (m/s) 
Normal distance from wall (m) 
Viscosity (Pa-s)
where
|
Density (kg/m3) |
|
Empirical constant = 0.09 |
|
Turbulent kinetic energy (m2/s2) |
|
Turbulent energy dissipation rate (m2/s3) |