Boundary conditions in dissipative particle dynamics

We study a continuum model for simulating solid boundaries of a DPD fluid. A layer of frozen DPD particles is placed on the wall boundary and a contin uum limit is taken. This produces effective dissipative and random forces. In addition, a reflection at the wall must be specified in order to confine the fluid. Three different wall reflection laws are studied and their effe ctiveness in producing stick boundary conditions and correct temperature di stributions is assessed by simulation of a planar Couette flow. (C) 1999 El sevier Science B.V. All rights reserved.