Depletion forces in non-equilibrium
arXiv:cond-mat/0306069 · doi:10.1103/PhysRevLett.91.248301
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