Turbulence Modelling of Strongly Swirling Flows
A two-dimensional swirling flow is considerably more complicated than two- dimensional plane flows, for additional strains arise due to the azimuthal motion, requiring the solution for azimuthal momentum. Swirl introduces intense azimuthal streamline curvature and hence curvature-turbulence interaction affects all six independent stress components. Therefore, the natural route is to apply Second-Moment Closures in predicting the Swirling flows. However, this is expensive computationally. One alternative is to adopt a non-linear stress and strain relationship of the Reynolds stresses.This can be achieved by assuming that the Reynolds stresses are taken to be non-linear function of the mean velocity gradients. The present study aims at investigating the capability of variants of non-linear eddy viscosity models on strongly swirling flows.
KeywordsComputational Fluid Dynamics Reynolds Stress Tangential Velocity Swirl Number Axial Velocity Distribution
- 3.R. M. C. So, S. A. Ahmed and H. C. Mongia: NASA CR-3832 (1984)Google Scholar