Rotational and translational self-diffusion in concentrated suspensions of permeable particles

Details Rotational and translational self-diffusion in concentrated suspensions of permeable particles Rotational and translational self-diffusion in concentrated suspensions of permeable particles

2011-03-20

arxiv.org/abs/1103.3820v1

Physics

Condensed Matter

Soft Condensed Matter

4 figures

Scientific paper

In our recent work on concentrated suspensions of uniformly porous colloidal spheres with excluded volume interactions, a variety of short-time dynamic properties were calculated, except for the rotational self-diffusion coefficient. This missing quantity is included in the present paper. Using a precise hydrodynamic force multipole simulation method, the rotational self-diffusion coefficient is evaluated for concentrated suspensions of permeable particles. Results are presented for particle volume fractions up to 45%, and for a wide range of permeability values. From the simulation results and earlier results for the first-order virial coefficient, we find that the rotational self-diffusion coefficient of permeable spheres can be scaled to the corresponding coefficient of impermeable particles of the same size. We also show that a similar scaling applies to the translational self-diffusion coefficient considered earlier. From the scaling relations, accurate analytic approximations for the rotational and translational self-diffusion coefficients in concentrated systems are obtained, useful to the experimental analysis of permeable-particle diffusion. The simulation results for rotational diffusion of permeable particles are used to show that a generalized Stokes-Einstein-Debye relation between rotational self-diffusion coefficient and high-frequency viscosity is not satisfied.

Affiliated with

Also associated with

No associations

Rating

Rotational and translational self-diffusion in concentrated suspensions of permeable particles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Rotational and translational self-diffusion in concentrated suspensions of permeable particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotational and translational self-diffusion in concentrated suspensions of permeable particles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-695146