title: Particle-layering effect in wall-bounded dissipative particle dynamics.
abstract: Dissipative particle dynamics (DPD) is a mesoscopic simulation method that describes "clusters" of molecules as a single numerical particle. DPD is a very effective method but it introduces numerical artifacts through the coarse-graining procedure, such as particle ordering in the near-wall region. These artifacts can result in nonphysical phenomena during a simulation of a polymer tethered to the wall undergoing shear flow: polymer sticking and overextension for higher shear rates. In this paper we report that a version of DPD with a so-called solidification boundary formulation and conservative-force interactions based on the equation of state allows to reduce number density fluctuations in near-wall region significantly.
authors.affiliation: Lehrstuhl für Aerodynamik, Technische Universität München, Garching, Germany.
authors.forename: Sergey
authors.initials: S
authors.lastname: Litvinov
authors.forename: Marco
authors.initials: M
authors.lastname: Ellero
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Hu
authors.forename: Nikolaus A
authors.initials: NA
authors.lastname: Adams