Direct numerical simulation of multiple interacting particles at intermediate Reynolds numbers
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 2 March 2015
Abstract
Purpose
The purpose of this paper is to study the flow patterns and particle-particle collisions during the sedimentation of multiple circular particles under gravity at intermediate Reynolds numbers through direct numerical simulations (DNS).
Design/methodology/approach
The previously developed lattice Boltzmann-direct forcing/fictitious domain (LB-DF/FD) method is adopted in this work to conduct DNS.
Findings
It is found that the number of particle-particle collisions display a linear growth at long times after an initial evolution, resulting in a constant collision rate, which also depends the initial arrangement.
Originality/value
The problem of particle-particle collisions during sedimentation with two kinds of particle density has not been considered before and it is of special importance in various industries.
Keywords
Acknowledgements
This work is supported by the National Program on Key Basic Research Project of China (No. 2011CB706501) and the National Natural Science Foundation of China (No. 11272302).
Citation
Nie, D., Qiu, L. and Zhang, X. (2015), "Direct numerical simulation of multiple interacting particles at intermediate Reynolds numbers", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 25 No. 2, pp. 202-213. https://doi.org/10.1108/HFF-04-2013-0138
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited