Indrani, A. V. ; Ramaswamy, Sriram (1995) Shear-induced enhancement of self-diffusion in interacting colloidal suspensions Physical Review E - Statistical, Nonlinear and Soft Matter Physics, 52 (6). pp. 6492-6496. ISSN 1539-3755
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Official URL: http://pre.aps.org/abstract/PRE/v52/i6/p6492_1
Related URL: http://dx.doi.org/10.1103/PhysRevE.52.6492
Abstract
We set up the generalized Langevin equations describing coupled single-particle and collective motion in a suspension of interacting colloidal particles in a shear flow and use these to show that the measured self-diffusion coefficients in these systems should be strongly dependent on shear rate ε.. Three regimes are found: (i) an initial const+ε.2, followed by (ii) a large regime of ε.½ behavior, crossing over to an asymptotic power-law approach (iii) D0-const×ε.-½ to the Stokes-Einstein value D0. The shear dependence is isotropic up to very large shear rates and increases with the interparticle interaction strength. Our results provide a straightforward explanation of recent experiments and simulations on sheared colloids.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 40119 |
Deposited On: | 21 May 2011 09:36 |
Last Modified: | 17 May 2016 22:19 |
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