Papers Published

1. Chellam, Shankararaman and Wiesner, Mark R., Evaluation of crossflow filtration models based on shear-induced diffusion and particle adhesion: Complications induced by feed suspension polydispersivity, Journal of Membrane Science, vol. 138 no. 1 (1998), pp. 83 - 97 [S0376-7388(97)00213-5] .
   (last updated on 2007/04/09)

   Abstract:
   Specific flux data were obtained during the transient period of flux decline in laminar crossflow filtration. Effects of hydrodynamics on cake parameters such as specific resistance, mass and particle size distribution were studied experimentally. An evaluation of crossflow filtration models suggests that a model based on shear-induced diffusion is a better predictor of specific flux decline than a particle adhesion model. Even for relatively narrowly distributed suspensions, polydispersivity complicates analyses in a manner that is not adequately addressed by these models. Changes in experimental specific cake resistances with module hydrodynamics coupled to the inadequacy of these models for accurately predicting time-dependent specific flux profiles, cake specific resistances, and mass suggests that cake morphology is a key variable that needs to be incorporated in future modeling efforts.

   Keywords:
   Ultrafiltration;Diffusion in liquids;Adhesion;Laminar flow;Hydrodynamics;Particle size analysis;Mass transfer;Morphology;Fouling;