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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

TURBULENCE MODIFICATION IN A HOMOGENEOUS TURBULENT SHEAR FLOW LADEN WITH SMALL HEAVY

pages 277-282
DOI: 10.1615/TSFP2.460
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RÉSUMÉ

Numerical simulations have been conducted for a homogeneous turbulent shear flow laden with small heavy particles in order to investigate the modification of turbulence structures in shear flows by particles. The effects on turbulence modification of particle drift due to gravity in the sheared direction are examined for particles with a response time comparable with the Kolmogorov time-scale of the turbulence. It is found that the growth rate of turbulence energy of the carrier fluid, which is reduced by the particles in zero gravity, is increased by the effect of weak gravity, but decreased by the effect of strong gravity. The interactions between concentrated regions of particles (particle clusters) and vortical structures are examined.

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