Isotropic stochastic rotation dynamics

Journal article
(Original article)


Publication Details

Author(s): Mühlbauer S, Strobl S, Pöschel T
Journal: Physical Review E
Publication year: 2017
Volume: 2
ISSN: 1063-651X
eISSN: 2470-0053
Language: English


Abstract


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 Authors / FAU Editors

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


How to cite

APA:
Mühlbauer, S., Strobl, S., & Pöschel, T. (2017). Isotropic stochastic rotation dynamics. Physical Review E, 2. https://dx.doi.org/10.1103/PhysRevFluids.2.124204

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

BibTeX: 

Last updated on 2018-06-08 at 11:19