OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

Numerical simulation of colloidal dispersion filtration: description of critical flux and comparison with experimental results

Bacchin, Patrice and Espinasse, Benjamin and Bessiere, Yolaine and Fletcher, David F. and Aimar, Pierre Numerical simulation of colloidal dispersion filtration: description of critical flux and comparison with experimental results. (2006) Desalination, vol. 1 (n° 1-3). pp. 74-81. ISSN 0011-9164

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
200kB

Official URL: http://dx.doi.org/10.1016/j.desal.2005.05.028

Abstract

During filtration via membrane processes, colloids accumulate at the porous surface leading to fouling phenomena. In this study, a rigorous simulation of momentum and mass transfer using CFD modelling has been developed to describe such an accumulation during cross flow filtration. These simulations integrate detailed modeling of physicochemical properties specific to colloidal dispersions (because of the surface interactions (repulsive and attractive) occurring between the colloids particles). These interactions are accounted for via the experimental variation of the colloidal osmotic pressure with volume fraction (associated with a variation in the diffusion coefficient) which are fitted by a relationship integrated into the CFD code. It contains a description of the colloidal phase transition leading to the formation of a condensed phase (deposit or gel layer) from the accumulated dispersed phase (concentration polarization). It is then possible to determine the critical flux which separates filtration conditions below which mass accumulation is reversible (in the dispersed phase) and above which it is irreversible (in the condensed phase). The computed value of critical flux is compared with that determined experimentally for a dispersion of latex particles.

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 Desalination website : http://www.sciencedirect.com/science/journal/00119164
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
Laboratory name:
Statistics:download
Deposited By: Hélène Dubernard

Repository Staff Only: item control page