3.2.12. Omega (Turbulence Eddy Frequency)

3.2.12.1. Automatic Values

The default turbulence eddy frequency is calculated as:

(3–5)

where:

is a non-dimensional constant

is the turbulent kinetic energy

is the kinematic viscosity

is the eddy viscosity ratio, which is set to 10 by default

3.2.12.2. Recommended Values

Unless you have information about the turbulent frequency for your application, use the Automatic initial guess (which is to use an Eddy Viscosity Ratio of 10).

3.2.12.3. Manual Specification

Turbulence eddy frequency can be specified as a function of:

  • Epsilon (that is, turbulence eddy dissipation)

  • Eddy Length Scale

    (3–6)

  • Eddy Viscosity Ratio

    (3–7)

Turbulence eddy frequency can also be specified directly as a CEL expression.