Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0009-2509(03)00252-5
Title: Diffusion coefficient of a charged porous sphere
Authors: Natraj, V.
Chen, S.B. 
Keywords: Diffusion
Electrical double layer
Hydrodynamics
Particle
Porous media
Relaxation effect
Issue Date: Aug-2003
Source: Natraj, V., Chen, S.B. (2003-08). Diffusion coefficient of a charged porous sphere. Chemical Engineering Science 58 (16) : 3621-3628. ScholarBank@NUS Repository. https://doi.org/10.1016/S0009-2509(03)00252-5
Abstract: The diffusion coefficient of a charged porous sphere is calculated numerically. The analysis is carried out under the Debye-Huckel approximation and the condition of equal ion diffusivity, yet can be applied to the case where the flow modification by the electrical body force is significant. As expected, the distortion of the charge cloud retards the movement of the particle. Our numerical results agree favorably with those based on a perturbation analysis for the case of very low electrical potential. When the particle charge is high enough, the electrical body force becomes increasingly strong to impede the fluid flow, thereby leading to a smaller resistance force compared to the perturbation result. © 2003 Elsevier Ltd. All rights reserved.
Source Title: Chemical Engineering Science
URI: http://scholarbank.nus.edu.sg/handle/10635/66526
ISSN: 00092509
DOI: 10.1016/S0009-2509(03)00252-5
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