Please use this identifier to cite or link to this item: https://doi.org/10.1006/jcis.1999.6353
Title: Hydrodynamic interactions and mean settling velocity of porous particles in a dilute suspension
Authors: Chen, S.B. 
Cai, A.
Keywords: Creeping flow
Hydrodynamic interaction
Permeability
Porous particles
Sedimentation
Issue Date: 15-Sep-1999
Citation: Chen, S.B., Cai, A. (1999-09-15). Hydrodynamic interactions and mean settling velocity of porous particles in a dilute suspension. Journal of Colloid and Interface Science 217 (2) : 328-340. ScholarBank@NUS Repository. https://doi.org/10.1006/jcis.1999.6353
Abstract: A theoretical investigation is conducted to study hydrodynamic interactions among porous spheres under creeping flow conditions. The particles may differ in size and permeability. Based on the Brinkman equation governing the fluid flow inside the particle, the flow field, and the drag force and torque on the particle are calculated numerically using a boundary collocation method. The results show that the hydrodynamic interaction increases with decreasing permeability. An important feature is that unlike the singular force and torque for two touching identical impermeable spheres undergoing certain motions with planar symmetry, the force and torque always remain finite for the case of two porous spheres. Using the resulting hydrodynamic interactions, the average sedimentation velocity of porous spheres suspended in a bounded fluid is also evaluated to determine the leading order effect of the particle concentration. Because of weaker hydrodynamic interactions among porous spheres, the hindrance coefficient is smaller than that for impermeable particles. When the porous spheres carry charge, the hindrance effect is augmented by increasing the double layer thickness.
Source Title: Journal of Colloid and Interface Science
URI: http://scholarbank.nus.edu.sg/handle/10635/92032
ISSN: 00219797
DOI: 10.1006/jcis.1999.6353
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

13
checked on Oct 23, 2018

WEB OF SCIENCETM
Citations

12
checked on Nov 29, 2017

Page view(s)

37
checked on Jul 6, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.