Depletion forces in non-equilibrium

Abstract

The concept of effective depletion forces between two fixed big colloidal particles in a bath of small particles is generalized to a non-equilibrium situation where the bath of small Brownian particles is flowing around the big particles with a prescribed velocity. In striking contrast to the equilibrium case, the non-equilibrium forces violate Newton's third law, are non-conservative and strongly anisotropic, featuring both strong attractive and repulsive domains.

4 pages, 3 figures

References in corpus (6)

• Traffic and Related Self-Driven Many-Particle Systems
• Dynamic Density Functional Theory of Fluids
• Depletion potential in hard-sphere mixtures: theory and applications
• Understanding depletion forces beyond entropy
• Effective interactions between star polymers and colloidal particles
• Mean-field dynamical density functional theory

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