The effects of channel width on particle sedimentation in fluids using a coupled lattice Boltzmann-discrete element model

Dan Pu, Miao Li, Linfang Shen, Zhiliang Wang, Zhenquan Li

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
72 Downloads (Pure)

Abstract

Understanding particle settlement in channeled fluids has wide applications, such as fine particulate matter, coronavirus particle transport, and the migration of solid particles in water. Various factors have been investigated but few studies have acknowledged the channel's effect on settlement dynamics. This study developed a coupled interpolated bounce-back lattice Boltzmann-discrete element model and examined how a channel's width affects particle settlement. A factor k denoting the ratio of the channel's width and the particle diameter was defined. The terminal settling velocity for a single particle is inversely proportional to k, and the time that the particle takes to reach the terminal velocity is positively related to k. When k is greater than 15, the channel width's effects are negligible. For dual particles of the same size, the drafting-kissing-tumbling (DKT) process occurs infinitely in a periodic pattern, with the two particles swapping positions and settling around the channel's centerline. The smaller the k, the sooner the DKT process occurs. The particles collide with the channel wall when k <= 10. For dual particles of different sizes, the DKT process occurs once so that the bigger particle leads the settlement. Both particles settle along the channel's centerline in a steady state. The bigger the k, the bigger the difference in their terminal settling velocities until k = 15. The small particle collides with the channel wall if released under the big particle when k = 6. The findings of this study are expected to inform channeling or pipeline design in relevant engineering practices.
Original languageEnglish
Article number053307
Number of pages25
JournalPhysics of Fluids
Volume35
Issue number5
DOIs
Publication statusPublished - 04 May 2023

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  • Aerospace (Journal)

    Li, Z. (Reviewer)

    01 Feb 202428 Feb 2024

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  • ANZIAM Journal (Journal)

    Li, Z. (Reviewer)

    01 Mar 202430 Mar 2024

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  • Water (Switzerland) (Journal)

    Li, Z. (Reviewer)

    01 Apr 202431 May 2024

    Activity: Publication peer-review and editorial workPeer review responsibility, including review panel or committee

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