Mühlbauer S, Strobl S, Pöschel T (2017)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2017
Book Volume: 2
Article Number: 124204
DOI: 10.1103/PhysRevFluids.2.124204
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.
APA:
Mühlbauer, S., Strobl, S., & Pöschel, T. (2017). Isotropic stochastic rotation dynamics. Physical Review E, 2. https://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: Download