Brownian-dynamics simulation studies of a charge-stabilized colloidal suspension under shear flow

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.50.R3326· OSTI ID:6808454

Chakrabarti, J ^[1]; Sood, A K; Krishnamurthy, H R ^[2]

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1. Department of Physics, Indian Institute of Science, Bangalore 560012 (India)
2. Department of Physics, Indian Institute of Science, Bangalore 560012 (India) Jawaharlal Nehru Center for Advanced Scientific Research, Indian Institute of Science campus, Bangalore 560012 (India)

We have carried out Brownian-dynamics simulations of a charged colloidal suspension under oscillatory shear flow with both Couette and Poiseuille velocity profiles. We show that in the steady-shear'' limit, for both of the velocity profiles, the enhancement of the self-diffusion coefficient in directions transverse to the flow shows a crossover from a [dot [gamma]][sup 2] dependence to a [dot [gamma]][sup 1/2] dependence as the shear rate [dot [gamma]] increases. The magnitude of the enhancement is a function of the interparticle interaction strength. There is a layering tendency in the direction of the velocity gradient for Couette flow, while such a tendency is not that prominent for Poiseuille flow.

• OSTI ID: 6808454
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 50:5; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SUSPENSIONS
SELF-DIFFUSION
BROWNIAN MOVEMENT
COLLOIDS
COMPUTERIZED SIMULATION
COUETTE FLOW
RELAXATION TIME
VISCOUS FLOW
DIFFUSION
DISPERSIONS
FLUID FLOW
SIMULATION
661300* - Other Aspects of Physical Science- (1992-)