Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN Print: 1-56700-135-1

DISPERSION OF SMALL HEAVY PARTICLES IN A UNIFORMLY SHEARED TURBULENCE

Abstract

We have carried out direct numerical simulations for the motions of small heavy particles in a uniformly sheared turbulence. The effects of the inertia and the drift velocity of particles on their dispersion are examined systematically by changing these two parameters independently. It is found in the limit of zero particle inertia that the particle dispersion both in the stream-wise and vertical directions becomes most active for the particles with some finite drift velocity. It is also found that the displacement of falling particles is asymmetric with respect to their mean displacement.