EFFECTS OF TWO-WAY COUPLING ON CLUSTERING OF SMALL PARTICLES IN A TURBULENT ENVIRONMENT

Abstract

 While the point-particle DNS (PP-DNS) is a promising approach for simulating particle-laden flows, its applicability to cases where the particle mass and/or volume loadings are high is still less clear, since the size of the particles is quite small and hence datasets available for verification of the method remains to be very limited. Here the applicability has been examined with the help of a reliable database of recently performed particle-resolved DNS (PR-DNS). It is revealed that the PP-DNS can predict turbulence modulation by particles only qualitatively. It is also presented by the PP-DNS that the preferenctial concentration of small particles in turbulence is less sensitive to the turbulence modulation.