TY - JOUR
T1 - Particle-particle interactions during normal flow filtration
T2 - Model simulations
AU - Kim, Myung Man
AU - Zydney, Andrew L.
N1 - Funding Information:
Support for this work was provided in part by grant CTS-0091552 from the National Science Foundation. The authors would also like to thank Professor Ali Borhan for assistance with FLUENT.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/8
Y1 - 2005/8
N2 - Although particle trajectory calculations have been used previously to analyze the behavior of membrane systems, these studies have ignored the effects of particle-particle interactions. Particle motion was evaluated by numerical integration of the Langevin equation accounting for the combined effects of electrostatic repulsion, enhanced hydrodynamic drag, Brownian diffusion, and interparticle forces. In the absence of Brownian forces, particles are unable to enter the pore unless the drag force associated with the filtration velocity can overcome the electrostatic repulsion. The presence of a second particle alters the particle trajectories, forcing the particles to attain equilibrium positions located symmetrically about the pore centerline. Interparticle forces can effectively push the particle over the energy barrier, significantly reducing the magnitude of the critical filtration velocity required for particle transmission. Brownian forces also allow particles to enter the pore, with the particle transmission increasing with increasing filtration velocity.
AB - Although particle trajectory calculations have been used previously to analyze the behavior of membrane systems, these studies have ignored the effects of particle-particle interactions. Particle motion was evaluated by numerical integration of the Langevin equation accounting for the combined effects of electrostatic repulsion, enhanced hydrodynamic drag, Brownian diffusion, and interparticle forces. In the absence of Brownian forces, particles are unable to enter the pore unless the drag force associated with the filtration velocity can overcome the electrostatic repulsion. The presence of a second particle alters the particle trajectories, forcing the particles to attain equilibrium positions located symmetrically about the pore centerline. Interparticle forces can effectively push the particle over the energy barrier, significantly reducing the magnitude of the critical filtration velocity required for particle transmission. Brownian forces also allow particles to enter the pore, with the particle transmission increasing with increasing filtration velocity.
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U2 - 10.1016/j.ces.2005.01.029
DO - 10.1016/j.ces.2005.01.029
M3 - Article
AN - SCOPUS:18844383677
SN - 0009-2509
VL - 60
SP - 4073
EP - 4082
JO - Chemical Engineering Science
JF - Chemical Engineering Science
IS - 15
ER -