Isotropic stochastic rotation dynamics

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Mühlbauer S, Strobl S, Pöschel T
Zeitschrift: Physical Review E
Jahr der Veröffentlichung: 2017
Band: 2
ISSN: 1063-651X
eISSN: 2470-0053
Sprache: Englisch


Stochastic rotation dynamics (SRD) is a widely used method for the

mesoscopic modeling of complex fluids, such as colloidal suspensions or

multiphase flows. In this method, however, the underlying Cartesian grid

defining the coarse-grained interaction volumes induces anisotropy. We

propose an isotropic, lattice-free variant of stochastic rotation

dynamics, termed iSRD. Instead of Cartesian grid cells, we employ

randomly distributed spherical interaction volumes. This eliminates the

requirement of a grid shift, which is essential in standard SRD to

maintain Galilean invariance. We derive analytical expressions for the

viscosity and the diffusion coefficient in relation to the model

parameters, which show excellent agreement with the results obtained in

iSRD simulations. The proposed algorithm is particularly suitable to

model systems bound by walls of complex shape, where the domain cannot

be meshed uniformly. The presented approach is not limited to SRD but is

applicable to any other mesoscopic method, where particles interact

within certain coarse-grained volumes.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Mühlbauer, Sebastian
Lehrstuhl für Multiscale Simulation of Particulate Systems
Pöschel, Thorsten Prof. Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems


Mühlbauer, S., Strobl, S., & Pöschel, T. (2017). Isotropic stochastic rotation dynamics. Physical Review E, 2.

Mühlbauer, Sebastian, Severin Strobl, and Thorsten Pöschel. "Isotropic stochastic rotation dynamics." Physical Review E 2 (2017).


Zuletzt aktualisiert 2018-06-08 um 11:19