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Migration and agglomeration of adhesive micro-particle suspensions in a pressure-driven duct flow

Liu, Wenwei and Wu, Charley (2020) Migration and agglomeration of adhesive micro-particle suspensions in a pressure-driven duct flow AIChE Journal.

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Abstract

Transport of suspensions consisting of monodisperse adhesive micro-particles in a pressure-driven duct flow with the Reynolds number in the range of 5.4-108 is analysed by means of a coupled lattice Boltzmann method with the discrete element method. The influence of the adhesion on migration and agglomeration of particles is investigated. The results show that the suspensions undergo a transition from purely lateral focusing to completely agglomeration as the surface energy is increased. A dimensionless adhesion number, defined as the ratio of the adhesive force to the drag force, is employed to characterise the degree of agglomeration. It is found that all the particles come into agglomerates as the adhesion number reaches a critical value. Moreover, a detailed examination of size evolution and velocity illustrates that the agglomerates mainly grow spherically, and their velocities depend on the lateral positions rather than their sizes, as the Stokes number is far below one.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Liu, Wenweiwenwei.liu@surrey.ac.uk
Wu, Charleyc.y.wu@surrey.ac.uk
Date : 14 March 2020
Funders : EPSRC
Grant Title : EPSRC Grant
Uncontrolled Keywords : Lattice Boltzmann method; Discrete element method; Adhesion; Agglomeration; Duct flow
Depositing User : James Marshall
Date Deposited : 16 Mar 2020 11:54
Last Modified : 16 Mar 2020 11:54
URI: http://epubs.surrey.ac.uk/id/eprint/853934

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