3.2.11. Epsilon (Turbulence Eddy Dissipation)

 

3.2.11.1. Automatic Values

The default turbulence eddy dissipation is calculated as:

(3–2)

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

 

3.2.11.2. Recommended Values

Unless you have information about the turbulence eddy dissipation for your application, use the Automatic initial guess.

 

3.2.11.3. Manual Specification

Turbulence eddy dissipation can be specified as a function of:

  • Omega (that is, turbulence eddy frequency)

  • Eddy Length Scale

    (3–3)

  • Eddy Viscosity Ratio

    (3–4)

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