Guo, JunweiZhou, QiWong, Ron Chik-Kwong2021-09-072022-09-072021-09-03Guo, J., Zhou, Q., & Wong, R. C. K. (2021). Numerical investigation of particle cloud sedimentation in power-law shear-thinning fluids for moderate Reynolds number. Chemical Engineering Science, 117066.http://hdl.handle.net/1880/113827https://doi.org/10.11575/PRISM/46044A series of numerical simulations are performed for the sedimentation process of a particle cloud in shear-thinning fluids using lattice Boltzmann and discrete element methods. The initial particle concentration, , and the power-law index of the fluid, n, and Reynolds number, , are varied in these simulations. For , the particle cloud size grows in the longitudinal direction as the cloud settles, leading to reduced particle concentration and a quasi-steady settling velocity, . The velocity ratio, , where is the corresponding single-particle terminal velocity, is found to decrease with both n and . This velocity ratio is only weakly dependent on the initial concentration () due to particle dispersion. For , the cloud loses its initial shape and disintegrates while settling, with particles escaping from the cloud due to differential particle settling velocities.engUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.sedimentationparticle cloudnon-Newtonian fluidsLattice Boltzmann methoddiscrete element methodjournal articlehttp://dx.doi.org/10.1016/j.ces.2021.117066