A stochastic subgrid model for sheared turbulence
Abstract
A new subgrid model for homogeneous turbulence is proposed. The model is used in a method of Large Eddy Simulation coupled with an E.D.Q.N.M. prediction of the statistical properties of the small scales. The model is stochastic in order to allow a "desaveraging" of the informations provided by the E.D.Q.N.M. closure. It is basedon stochastic amplitude equations for two-point closures. It allows backflow of energy from the small scales, introduces stochasticity into L.E.S., and is well adapted to non isotropic fields. A few results are presented here.
- Publication:
-
Macroscopic Modelling of Turbulent Flows
- Pub Date:
- 1985
- DOI:
- Bibcode:
- 1985LNP...230..100B
- Keywords:
-
- Computational Fluid Dynamics;
- Computational Grids;
- Shear Flow;
- Stochastic Processes;
- Turbulence Models;
- Turbulent Flow;
- Damping;
- Eddy Viscosity;
- Homogeneous Turbulence;
- Isotropic Turbulence;
- Fluid Mechanics and Heat Transfer