کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
611506 880677 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Colloidal dynamics: Influence of diffusion, inertia and colloidal forces on cluster formation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Colloidal dynamics: Influence of diffusion, inertia and colloidal forces on cluster formation
چکیده انگلیسی

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 account inertial term in Langevin equation and another based on diffusional approximation proposed in [D.L. Ermak, J.A. McCammon, J. Chem. Phys. 69 (1978) 1352], has shown that both models enable the prediction of the correct values of the diffusion coefficient and residence time of particle in a doublet and are 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.

Time evolution of ensemble of 4 colloidal particles depending on the depth of the potential well of colloidal forces.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 325, Issue 2, 15 September 2008, Pages 377–385
نویسندگان
, , , , ,