The effects of extended pressure-strain models on the calculations of complex turbulent flows
Abstract
A number of approaches is available to approximate the Reynolds shear stresses in the mean turbulent boundary-layer equations for incompressible flows. The present investigation is concerned with an examination of three different pressure-strain models for incompressible complex shear flows. One is based on the return-to-isotropy model reported by Rotta (1951), while another includes the symmetric mean strain effect. The model discussed by Launder et al. (1975) is also considered. This model includes both the symmetric as well as the antisymmetric mean strain effects. In addition to the three pressure-strain models, two different pressure-temperature-gradient models are investigated for incompressible, complex shear flows with heat transfer. On the basis of the obtained results, it is concluded that the simple pressure-strain and pressure-temperature-gradient models can be used to predict correctly the curvature and swirl effects on the shear stresses and heat flux in an algebraic-stress closure scheme.
- Publication:
-
IN: Thermal sciences 16; Proceedings of the Sixteenth Southeastern Seminar on Thermal Sciences
- Pub Date:
- 1983
- Bibcode:
- 1983wdch.book.....S
- Keywords:
-
- Computational Fluid Dynamics;
- Incompressible Flow;
- Reynolds Stress;
- Shear Flow;
- Turbulent Flow;
- Turbulent Heat Transfer;
- Closure Law;
- Flow Geometry;
- High Reynolds Number;
- Isotropic Turbulence;
- Prandtl Number;
- Pressure Gradients;
- Swirling;
- Fluid Mechanics and Heat Transfer