Volume 8 Issue 4
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Wang, L., Zhou, G., Wang, X., Xiong, Q., & Ge, W. (2010). Direct numerical simulation of particle–fluid systems by combining time-driven hard-sphere model and lattice Boltzmann method. Particuology, 8(4), 379-382. https://doi.org/10.1016/j.partic.2010.07.003

Direct numerical simulation of particle–fluid systems by combining time-driven hard-sphere model and lattice Boltzmann method

Limin Wang a *, Guofeng Zhou a b, Xiaowei Wang a, Qingang Xiong a b, Wei Ge a
a State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
b Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
10.1016/j.partic.2010.07.003
Volume 8, Issue 4, August 2010, Pages 379-382
Received 25 June 2010, Revised 7 July 2010, Accepted 9 July 2010, Available online 11 August 2010.
E-mail: lmwang@home.ipe.ac.cn

Highlights
Abstract

A coupled numerical method for the direct numerical simulation of particle–fluid systems is formulated and implemented, resolving an order of magnitude smaller than particle size. The particle motion is described by the time-driven hard-sphere model, while the hydrodynamic equations governing fluid flow are solved by the lattice Boltzmann method (LBM). Particle–fluid coupling is realized by an immersed boundary method (IBM), which considers the effect of boundary on surrounding fluid as a restoring force added to the governing equations of the fluid. The proposed scheme is validated in the classical flow-around-cylinder simulations, and preliminary application of this scheme to fluidization is reported, demonstrating it to be a promising computational strategy for better understanding complex behavior in particle–fluid systems.

Graphical abstract
Keywords
Direct numerical simulation; Immersed boundary method; Lattice Boltzmann method; Particle–fluid systems; Time-driven hard-sphere model