A stochastic boundary forcing for dissipative particle dynamics

  • Authors:

  • Adrian M. Altenhoff;Jens H. Walther;Petros Koumoutsakos

  • Affiliations:

  • Institute of Computational Science, ETH Zurich, Switzerland;Institute of Computational Science, ETH Zurich, Switzerland and Department of Mechanical Engineering, Fluid Mechanics, Building 403, DK-2800 Lyngby, Denmark;Institute of Computational Science, ETH Zurich, Switzerland

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2007

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Abstract

The method of dissipative particle dynamics (DPD) is an effective, coarse grained model of the hydrodynamics of complex fluids. DPD simulations of wall-bounded flows are however often associated with spurious fluctuations of the fluid properties near the wall. We present a novel stochastic boundary forcing for DPD simulations of wall-bounded flows, based on the identification of fluctuations in simulations of the corresponding homogeneous system at equilibrium. The present method is shown to enforce accurately the no-slip boundary condition, while minimizing spurious fluctuations of material properties, in a number of benchmark problems.