Abstract
The present work contains results from numerical simulations of particle-laden isotropic turbulence at high Reynolds and Stokes numbers (up to Re λ =265 and St=100 based on the Taylor length scale and Kolmogorov time scale, respectively). The focus is on the effect of small-scale turbulence on the particles, a modelling issue for LES of particle-laden flow. The results show that in dependence of Stokes number, particles tend to cluster in regions where kinetic energy of the unresolved scales is lower than average. This effect was so far neglected in most LES models for particle-laden flow. Furthermore, the results show that locations for particle clustering and mechanisms leading to clustering are dominated by large-scale dynamics, a promising result for LES.
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Gobert, C., Manhart, M. (2010). Numerical Experiments for Quantification of Small-Scale Effects in Particle-Laden Turbulent Flow. In: Wagner, S., Steinmetz, M., Bode, A., Müller, M. (eds) High Performance Computing in Science and Engineering, Garching/Munich 2009. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-13872-0_7
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DOI: https://doi.org/10.1007/978-3-642-13872-0_7
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