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Numerical simulation of colloid dead-end filtration: effect of membrane characteristics and operating conditions on matter accumulation

Bessiere, Yolaine and Fletcher, David F. and Bacchin, Patrice Numerical simulation of colloid dead-end filtration: effect of membrane characteristics and operating conditions on matter accumulation. (2008) Journal of Membrane Science, vol. 3 (n°1-2). pp. 52-59. ISSN 0376-7388

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Official URL: http://dx.doi.org/10.1016/j.memsci.2007.12.064

Abstract

The aim of this work is to develop a simulation capability applicable to dead-end filtration of colloidal dispersions in order to investigate the effect of process conditions, such as membrane configuration and operating parameters, on filtration efficiency through the analysis of the appearance of a deposit on the membrane. To reach this goal, a model describing the transport behaviour of a concentrated colloidal dispersion is implemented in a commercial CFD code (ANSYS-CFX). The collective diffusion induced by inter-particle interactions is accounted for from knowledge of the variation of the osmotic pressure with the particle volume fraction. Coupled with a transient, two dimensional hydrodynamic solution, such a model allows description of the mass transport properties both in the dispersed (concentration polarization) and the condensed (deposit) forms of accumulation. Two-dimensional concentration profiles along the membrane are obtained. Simulations are used to understand the role of operating parameters and membrane characteristics on the appearance of a deposit at the membrane surface. This formation is controlled by the hollow fibre configuration, where there are zones working in both cross-flow and dead-end mode due to the particular hydrodynamic conditions.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Membrane Science website : http://www.sciencedirect.com/science/journal/03767388
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > University of Sydney (AUSTRALIA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Hélène Dubernard
Deposited On:04 Nov 2008 09:29

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