A new wall boundary condition in particle methods

We present a new formulation of the boundary condition for solid walls in particulate fluid flows. It integrates traditional treatments of bounce-back and Maxwellian reflections, and hence ensures both no-slip condition and effective thermostat on the wall. The formulation was validated in a series of simulations with pseudo-particle modeling [W. Ge, J. Li, Chem. Eng. Sci. 58 (2003) 1565–1585].