Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2012-01-26
Journal of Chemical Physics 136,064901 (2012)
Physics
Condensed Matter
Soft Condensed Matter
15 pages, 9 figures, accepted for publication in the Journal of Chemical Physics
Scientific paper
10.1063/1.3684752
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.
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