Controlling density fluctuations in wall-bounded dissipative particle dynamics systems.
Dissipative Particle Dynamics (DPD) simulations of wall-bounded flows exhibit density fluctuations that depend strongly on the no-slip boundary condition and increase with the level of coarse graining. We develop an adaptive model for wall-particle interactions that eliminates such oscillations and can target prescribed density profiles. Comparisons are made with ideal no-slip boundary conditions and molecular dynamics simulations. The new model is general and can be used in other coarse-grained particle methods.
Pivkin
Igor V
IV
Division of Applied Mathematics, Brown University, Providence, Rhode Island 02912, USA. piv@dam.brown.edu
Karniadakis
George Em
GE
D004247:DNA / Q000737:chemistry; D046210:Microfluidic Analytical Techniques / Q000379:methods*; D008954:Models, Biological; D008956:Models, Chemical; D010316:Particle Size; D014783:Viscosity; D014867:Water / Q000737:chemistry
D014867:Water; D004247:DNA