A twoequation turbulence model consistent with the second law of thermodynamics
Abstract
Thermodynamics of turbulence and the derivation of a twoequation turbulence model which satisfies the second law are briefly reviewed. It is shown that the resulting governing equations resemble those of the kappaepsilon model, with the epsilonequation being quite different. The 'TEACH' code is modified to account for the required modifications of the new model. Two test cases are considered in this study; a confined coaxial round jet expansion, and a backwardfacing plane step. The resulting velocity and turbulent kinetic energy profiles are compared with the experimental data, and the predictions of the standard kappaepsilon model. It is shown that the new model predicts kinetic turbulence energy of the flow more accurately in comparison to the standard model.
 Publication:

24th AIAA Aerospace Sciences Meeting
 Pub Date:
 January 1986
 Bibcode:
 1986aiaa.meetU....B
 Keywords:

 Computational Fluid Dynamics;
 Flow Equations;
 Thermodynamics;
 Turbulence;
 Turbulence Models;
 Backward Facing Steps;
 Computational Grids;
 KEpsilon Turbulence Model;
 Kinetic Energy;
 Velocity Distribution;
 Fluid Mechanics and Heat Transfer