A critical comparison of turbulence models for homogeneous shear flows in a rotating frame
Abstract
A variety of turbulence models, including five secondorder closure models and four two equation models, are tested for the problem of homogeneous turbulent shear flow in a rotating frame. The model predictions for the time evolution of the turbulent kinetic energy and dissipation rate, as well as those for the equilibrium states, are compared with the results of physical and numerical experiments. Most of the twoequation models predict the same results for all rotation rates (omega/S) in which there is an exponential time growth of the turbulent kinetic energy and dissipation rate. The secondorder closures are qualitatively superior since, consistent with physical and numerical experiments, they only predict this type of unstable flow for intermediate rotation rates in the range 0.1 less than or equal to omega/S less than or equal to 1.6. For rotation rates outside this range, there is an exchange of stabilities with a solution whose kinetic energy and dissipation rate decay with time. Although the secondorder closures are superior to the twoequation models, there are still problems with the quantitative accuracy of thier predictions.
 Publication:

7th Symposium on Turbulent Shear Flows, Volume 2
 Pub Date:
 1989
 Bibcode:
 1989tsf.....2...27S
 Keywords:

 Computational Fluid Dynamics;
 Homogeneous Turbulence;
 Shear Flow;
 Turbulence Models;
 Turbulent Flow;
 Closure Law;
 Dissipation;
 Flow Equations;
 Kinetic Energy;
 Mathematical Models;
 Fluid Mechanics and Heat Transfer