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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

ON THE APPLICATION OF LARGE-EDDY SIMULATION TO PARTICLE-LADEN FLOWS

Vincenzo Armenio
Dipartimento di Ingegneria Civile Universita degli Studi di Trieste 34127 Trieste, Italy; Dipartimento di Ingegneria Civile e Ambientale, Universitá di Trieste, Piazzale Europa 1, 34127 Trieste, Italy

Ugo Piomelli
Dept. of Mechanical Engineering University of Maryland College Park, MD 20742, USA; Department of Mechanical and Materials Engineering Queen's University, Kingston (ON) K7L 3N6, Canada

Virgilio Fiorotto
Dipartimento di Ingegneria Civile Universita degli Studi di Trieste 34127 Trieste, Italy

Abstract

A priori and a posteriori evaluation of the effect of the unresolved, subgrid, scales on the deposition of heavy particles are carried out. The deposition statistics obtained from the direct simulation of turbulent channel flow are compared with the results of two large-eddy simulations. Although the small scales, which are not resolved in the large-eddy simulations, are found to affect significantly the settling velocity, other quantities (the deposition rate and the distribution of the settled particles) are predicted accurately.