Large-eddy simulation of a particle-laden turbulent channel flow

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Large-eddy simulations of a vertical turbulent channel flow with 420,000 solid particles are performed in order to get insight into fundamental aspects of a riser flow The question is addressed whether collisions between particles are important for the ow statistics. The turbulent channel ow corresponds to a particle volume fraction of 0.013 and a mass load ratio of 18, values that are relatively high compared to recent literature on large-eddy simulation of two-phase flows. In order to simulate this ow, we present a formulation of the equations for compressible ow in a porous medium including particle forces. These equations are solved with LES using a Taylor approximation of the dynamic subgrid-model. The results show that due to particle-fluid interactions the boundary layer becomes thinner, leading to a higher skin-friction coefficient. Important effects of the particle collisions are also observed, on the mean fluid prole, but even more o on particle properties. The collisions cause a less uniform particle concentration and considerably flatten the mean solids velocity prole.
Original languageEnglish
Title of host publicationDirect and large-eddy simulation V : proceedings of the fifth international ERCOFTAC workshop on direct and large-eddy simulation, held at the Munich University of Technology, August 27-29, 2003
EditorsR. Friedrich, B.J. Geurts, O. Métais
Place of PublicationMunich, Germany
PublisherKluwer Academic Publishers
ISBN (Print)978-90-481-6575-9
Publication statusPublished - 2004
Event5th ERCOFTAC Workshop on Direct and Large-Eddy Symulation (DLES5), August 27-29, 2003, Munich, Germany - Munich University of Technology, Munich, Germany
Duration: 27 Aug 200329 Aug 2003

Publication series

NameErcoftac Series
ISSN (Print)1382-4309


Conference5th ERCOFTAC Workshop on Direct and Large-Eddy Symulation (DLES5), August 27-29, 2003, Munich, Germany


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