Modelling of compressible turbulent flows  Present possibilities and perspectives
Abstract
Possibilities of modeling the compressible turbulent flow are discussed, with special attention given to secondorder closure models such as the eddy viscosity concept models, zeroequation models, twoequation models, and secondmoment closure models. It is emphasized that there is no universal turbulence model to be recommended for all compressible cases and that, when choosing an adequate model for complex turbulent flow computations, it is necessary to compromise between performance and cost. For example, for equilibrium flows and in thin shearlayer approximation, the zeroequation models seem to be sufficient, while in cases where the turbulence field variables are not in equilibrium with the mean flow, only the transport equation turbulence models are able to provide detailed information on turbulence. The cost of achieving converged solution with the increasingly complex models, namely, algebraic, twoequation, and secondorder closure models, increases roughly in the order 1:2:5.
 Publication:

IN: Turbulent shearlayer/shockwave interactions (A8851151 2202). SpringerVerlag
 Pub Date:
 1986
 Bibcode:
 1986tsls.book...13H
 Keywords:

 Closure Law;
 Compressible Flow;
 Flow Equations;
 Mathematical Models;
 Turbulent Flow;
 Computerized Simulation;
 Eddy Viscosity;
 NavierStokes Equation;
 Reynolds Stress;
 Three Dimensional Models;
 Turbulence Models;
 Fluid Mechanics and Heat Transfer