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Title: Colloidal dynamics: influence of diffusion, inertia and colloidal forces on cluster formation
Authors: Kovalchuk, Nina
Starov, Victor
Langston, Paul
Hilal, Nidal
Zhdanov, Viacheslav G.
Keywords: Colloidal suspensions
Langevin equations
Colloidal forces
Brownian forces
Hydrodynamic interactions
Fluctuation-dissipation theorem
Issue Date: 2008
Publisher: © Elsevier
Citation: KOVALCHUK, N. ... et al, 2008. Colloidal dynamics: influence of diffusion, inertia and colloidal forces on cluster formation. Journal of Colloid and Interface Science, 325 (2), 15 pp. 377-385.
Abstract: Computer simulations of colloidal suspensions are discussed. The simulations are based on the Langevin equations, pairwise interaction between colloidal particles and take into account Brownian, hydrodynamic and colloidal forces. Comparison of two models, one taking into accout inertial term in Langevin equation and other based on diffusional approximation proposed in Ermak D.L., and McCammon J.A. J. Chem. Phys., 1978, 69, 1352 have shown that both models the prediction of the correct values of the diffusion coefficient and residence time of particle in a doublet and ere therefore suitable to study the dynamics of formation and breakage of clusters in colloidal suspensions. It is shown that the appropriate selection of the time step and taking into account inertia of particles provides also the correct value of the average kinetic energy of each particle during the simulations, what allows to use the model based on full Langevin equations as a reference model to verify the validity of the numerical scheme for simulation using diffusion approximation.
Description: This article was published in the Journal of Colloid and Interface science [© Elsevier]. The definitive version is available from: http://www.sciencedirect.com/science/journal/00219797
URI: https://dspace.lboro.ac.uk/2134/3385
ISSN: 0021-9797
Appears in Collections:Published Articles (Chemical Engineering)

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