1201.5502 (Robert D. Groot)

How to impose stick boundary conditions in coarse-grained hydrodynamics
of Brownian colloids and semi-flexible fiber rheology    [PDF]

Robert D. Groot

Long-range hydrodynamics between colloidal particles or fibers is modelled by
the Fluid Particle Model. Two methods are considered to impose the fluid
boundary conditions at colloidal surfaces. In the first method radial and
transverse friction forces between particle and solvent are applied such that
the correct friction and torque follows for moving or rotating particles. The
force coefficients are calculated analytically and checked by numerical
simulation. In the second method a collision rule is used between colloidal
particle and solvent particle that imposes the stick boundary conditions
exactly. The collision rule comprises a generalisation of the Lowe-Anderson
thermostat to radial and transverse velocity differences.

View original: http://arxiv.org/abs/1201.5502