Multiple-scale turbulence closure modeling of confined recirculating flows
Abstract
A multiple-scale turbulence closure scheme is developed for the numerical predictions of confined recirculating flows. This model is based on the multiple-time-scale concepts of Hanjalic et al. (1980) and takes into account the non-equilibrium spectra energy transfer mechanism. Problems concerning new formulation of energy transfer rate equations and subsequent model coefficient redefinition and energy spectrum partition are discussed. Comparisons are made with several experiments of internal recirculating flows for the purpose of model validation. Numerical results using the present model show significant improvement of predictive capability over that obtained with the single-scale k-epsilon model and show promising potential for complex turbulent flow predictions.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1985
- Bibcode:
- 1985STIN...8612551C
- Keywords:
-
- Closure Law;
- Computational Fluid Dynamics;
- Energy Spectra;
- Models;
- Nonequilibrium Flow;
- Recirculative Fluid Flow;
- Time Dependence;
- Turbulence;
- K-Epsilon Turbulence Model;
- Predictions;
- Transfer Functions;
- Turbulent Flow;
- Fluid Mechanics and Heat Transfer