Numerical study of segregation using a new drag force correlation for polydisperse systems derived from lattice-Boltzmann simulations

R. Beetstra, M.A. Hoef, van der, J.A.M. Kuipers

Research output: Contribution to journalArticleAcademicpeer-review

161 Citations (Scopus)

Abstract

Discrete particle simulations of a segregating system are performed using various drag relations and boundary conditions, and compared to experiments. The boundary conditions on the walls are found to have a large influence on the segregation behaviour of the fluidised bed, where no-slip conditions result in unrealistic flow patterns. A polydispersity factor, which was recently derived on the basis of lattice-Boltzmann (LBM) simulations, is found to have a major effect on the segregation velocity and the final degree of segregation. The best agreement with experimental results is obtained with drag relations that were recently proposed based on LBM-simulations in combination with the aforementioned polydispersity factor.
Original languageEnglish
Pages (from-to)246-255
JournalChemical Engineering Science
Volume62
Issue number1-2
DOIs
Publication statusPublished - 2007

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