Please use this identifier to cite or link to this item:
Title: Faxen's laws of a composite sphere under creeping flow conditions
Authors: Chen, S.B. 
Ye, X.
Keywords: Composite particle
Creeping flow
Faxen's law
Reciprocal theorem
Issue Date: 1-Jan-2000
Citation: Chen, S.B., Ye, X. (2000-01-01). Faxen's laws of a composite sphere under creeping flow conditions. Journal of Colloid and Interface Science 221 (1) : 50-57. ScholarBank@NUS Repository.
Abstract: Under creeping flow conditions, Faxen's laws are derived for a composite sphere comprising a solid core covered by a permeable layer of arbitrary thickness. The derivations are carried out by applying reciprocal theorem in combination with fluid velocity and pressure distributions in certain simple flow as a comparison field. In this regard, the fluid velocity disturbances caused by a composite sphere subject to a simple shear flow and a rotational flow are solved individually. In the limiting case where the solid core vanishes, the resulting Faxen expressions for the drag force, torque, and stresslet compare very well with the existing Faxen's law for a porous sphere. It is found that when the porous layer is thick enough and its permeability is sufficiently low, the hydrodynamic behavior of a composite sphere can be approximated by that of a porous particle with equal permeability. This can be explained by the fact that the fluid cannot penetrate deeply into a porous layer of low permeability to flow through the pores near the core surface, and thereby the fluid can hardly feel the resistance from the core surface.
Source Title: Journal of Colloid and Interface Science
ISSN: 00219797
DOI: 10.1006/jcis.1999.6552
Appears in Collections:Staff Publications

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


checked on Jun 22, 2021


checked on Jun 22, 2021

Page view(s)

checked on Jun 21, 2021

Google ScholarTM



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