Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN Print: 1-56700-135-1

PREDICTION OF TIME-MEAN CHARACTERISTICS AND PERIODICAL FLUCTUATION OF VELOCITY AND THERMAL FIELDS OF A BACKWARD-FACING STEP

Résumé

The present study presents the results of a three-component decomposition approach for the two- and three-dimensional computations of a turbulent flow over a backward-facing step. By this approach, effect of periodical fluctuation on the studied flow and temperature field incurred by the discrete counter-rotating vortices appearing in the free shear layer is discussed. Consequently, significance of the influence of this periodical fluctuation to the instantaneous fluid and heat transfer characteristics and eventually to the time mean momentum and heat transfer is demonstrated.