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Colloidal dynamics: influence of diffusion, inertia and colloidal forces on cluster formation
journal contribution
posted on 2008-06-12, 12:31 authored by Nina Kovalchuk, Victor Starov, Paul Langston, Nidal Hilal, Viacheslav G. ZhdanovComputer 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.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
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.Publisher
© ElsevierPublication date
2008Notes
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/00219797ISSN
0021-9797Language
- en