A complete model of turbulence revisited
Abstract
The closure approximations used in the two-equation turbulence models are reviewed in order to determine an optimum choice of dependent variables. By using a combination of perturbation methods and numerical computations, it is shown that the conventional k-epsilon and k-omega-squared formulations are generally inaccurate for boundary layers in an adverse pressure gradient and that a more suitable choice of dependent variables exists. As a result, a new two-equation model is developed which shows promise of being more accurate for boundary layers in an adverse pressure gradient than any other similar model.
- Publication:
-
AIAA, Aerospace Sciences Meeting
- Pub Date:
- January 1984
- Bibcode:
- 1984aiaa.meetU....W
- Keywords:
-
- Closure Law;
- Computational Fluid Dynamics;
- Mathematical Models;
- Navier-Stokes Equation;
- Numerical Flow Visualization;
- Turbulence Models;
- Turbulent Boundary Layer;
- Fluid Injection;
- Incompressible Boundary Layer;
- K-Epsilon Turbulence Model;
- Kinetic Equations;
- Perturbation Theory;
- Pressure Gradients;
- Surface Roughness Effects;
- Wall Flow;
- Fluid Mechanics and Heat Transfer