Turbulence Modelling of Strongly Swirling Flows

  • L. K. Yeh
  • C. A. Lin
Conference paper

Abstract

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.

Keywords

Vortex Acoustics 

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • L. K. Yeh
    • 1
  • C. A. Lin
    • 1
  1. 1.Department of Power Mechanical EngineeringNational Tsing Hua UniversityHsinchuTaiwan

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