Fluid-solid boundary conditions for multiparticle collision dynamics

Jonathan K. Whitmer, Erik Luijten

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

The simulation of colloidal particles suspended in solvent requires an accurate representation of the interactions between the colloids and the solvent molecules. Using the multiparticle collision dynamics method, we examine several proposals for stick boundary conditions, studying their properties in both plane Poiseuille flow (where fluid interacts with the boundary of a stationary macroscopic solid) and particle-based colloid simulations (where the boundaries are thermally affected and in motion). In addition, our simulations compare various collision rules designed to remove spurious slip near solid surfaces, and the effects of these rules on the thermal motion of colloidal particles. Furthermore, we demonstrate that stochastic reflection of the fluid at solid boundaries fails to faithfully represent stick boundary conditions, and conclude that bounce-back conditions should be applied at both mobile and stationary surfaces. Finally, we generalize these ideas to create partial slip boundary conditions at both stationary and mobile surfaces.

Original languageEnglish (US)
Article number104106
JournalJournal of Physics Condensed Matter
Volume22
Issue number10
DOIs
StatePublished - Mar 9 2010

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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