K-epsilon models

From CFD-Wiki

Introduction

The K-epsilon model is one of the most common turbulence models. It is a two equation model, that means, it includes two extra transport equations to represent the turbulent properties of the flow. This allows a two equation model to account for history effects like convection and diffusion of turbulent energy. The first transported variable is turbulent kinetic energy, . The second transported variable in this case is the turbulent dissipation, . It is the variable that determines the scale of the turbulence, whereas the first variable, , determines the energy in the turbulence.

Usual K-epsilon models

1. Standard k-epsilon model
2. Realisable k-epsilon model
3. RNG k-epsilon model

Miscellaneous

1. Near-wall treatment for k-epsilon models