Hydrodynamic effects in polydisperse charged colloidal suspensions at short times

Nägele, Gerhard; Kellerbauer, O; Krause, R.; Klein, R.

doi:10.1103/physreve.47.2562

Cited by 53 publications

(39 citation statements)

References 27 publications

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“…The work on charged colloidal suspensions has been reviewed by Nägele [2]. As he points out [2,14], many-body hydrodynamic effects become noticeable at volume fractions above about 10% and one has to resort to the elaborate fluctuation expansion in this concentration regime. To date, there are very few experimental data on concentrated charged colloidal suspensions [13]; it is this region of dense charged colloidal dispersions we address in this paper.…”

Section: Effective Screening Of Hydrodynamic Interactions In Charged mentioning

confidence: 99%

Effective Screening of Hydrodynamic Interactions in Charged Colloidal Suspensions

Riese¹,

Wegdam²,

Vos³

et al. 2000

Phys. Rev. Lett.

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Section: Effective Screening Of Hydrodynamic Interactions In Charged mentioning

confidence: 99%

Effective Screening of Hydrodynamic Interactions in Charged Colloidal Suspensions

Riese¹,

Wegdam²,

Vos³

et al. 2000

Phys. Rev. Lett.

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“…52 Unless different species have constant scattering amplitude and f α = f β , we generally have S N N (q) S M (q), making the interpretation of experiments with polydisperse systems difficult.…”

Section: A Static Structuresmentioning

confidence: 99%

Short-time transport properties of bidisperse suspensions and porous media: A Stokesian dynamics study

Wang

Brady

2015

The Journal of Chemical Physics

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We present a comprehensive computational study of the short-time transport properties of bidisperse hard-sphere colloidal suspensions and the corresponding porous media. Our study covers bidisperse particle size ratios up to 4 and total volume fractions up to and beyond the monodisperse hard-sphere close packing limit. The many-body hydrodynamic interactions are computed using conventional Stokesian Dynamics (SD) via a Monte-Carlo approach. We address suspension properties including the short-time translational and rotational self-diffusivities, the instantaneous sedimentation velocity, the wavenumber-dependent partial hydrodynamic functions, and the high-frequency shear and bulk viscosities and porous media properties including the permeability and the translational and rotational hindered diffusivities. We carefully compare the SD computations with existing theoretical and numerical results. For suspensions, we also explore the range of validity of various approximation schemes, notably the pairwise additive approximations with the Percus-Yevick structural input. We critically assess the strengths and weaknesses of the SD algorithm for various transport properties. For very dense systems, we discuss in detail the interplay between the hydrodynamic interactions and the structures due to the presence of a second species of a different size. C 2015 AIP Publishing LLC. [http://dx

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“…The q-independent parameters f α and f α β were computed by least-square fitting the SD measurements and the rescaled δγ scheme as in Eqs. (28) and (30). The fitted partial hydrodynamic functions are presented as solid curves in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

“…a) mwwang@caltech.edu b) mheinen@caltech.edu c) jfbrady@caltech.edu Experiments on polydisperse suspensions have so far been limited to very high densities, [27][28][29] where polydispersity suppresses crystallization and facilitates studies of the glass transition or to fluid mixtures of charged particles which exhibit strong pair correlations already at low volume fractions. 30 Moderately dense, polydisperse equilibrium suspensions are experimentally underattended to date, despite their resemblance of many substances handled in industrial, biological, and medical applications. Polydispersity is the rule rather than the exception in naturally occurring suspensions and should therefore receive more attention in experimental, theoretical, and computational studies.…”

Section: Introductionmentioning

confidence: 99%

Short-time diffusion in concentrated bidisperse hard-sphere suspensions

Wang

Heinen

Brady

2015

The Journal of Chemical Physics

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Diffusion in bidisperse Brownian hard-sphere suspensions is studied by Stokesian Dynamics (SD) computer simulations and a semi-analytical theoretical scheme for colloidal short-time dynamics, based on Beenakker and Mazur's method [Physica A 120, 388-410 (1983); 126, 349-370 (1984)]. Two species of hard spheres are suspended in an overdamped viscous solvent that mediates the salient hydrodynamic interactions among all particles. In a comprehensive parameter scan that covers various packing fractions and suspension compositions, we employ numerically accurate SD simulations to compute the initial diffusive relaxation of density modulations at the Brownian time scale, quantified by the partial hydrodynamic functions. A revised version of Beenakker and Mazur's δγ-scheme for monodisperse suspensions is found to exhibit surprisingly good accuracy, when simple rescaling laws are invoked in its application to mixtures. The so-modified δγ scheme predicts hydrodynamic functions in very good agreement with our SD simulation results, for all densities from the very dilute limit up to packing fractions as high as 40%. C 2015 AIP Publishing LLC.[http://dx

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Hydrodynamic effects in polydisperse charged colloidal suspensions at short times

Cited by 53 publications

References 27 publications

Effective Screening of Hydrodynamic Interactions in Charged Colloidal Suspensions

Effective Screening of Hydrodynamic Interactions in Charged Colloidal Suspensions

Short-time transport properties of bidisperse suspensions and porous media: A Stokesian dynamics study

Short-time diffusion in concentrated bidisperse hard-sphere suspensions

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