Parallel in time approximation of the lattice Boltzmann method for laminar flows

Published

Journal Article

Fluid dynamics simulations using grid-based methods, such as the lattice Boltzmann equation, can benefit from parallel-in-space computation. However, for a fixed-size simulation of this type, the efficiency of larger processor counts will saturate when the number of grid points per core becomes too small. To overcome this fundamental strong scaling limit in space-parallel approaches, we present a novel time-parallel version of the lattice Boltzmann method using the parareal algorithm. This method is based on a predictor-corrector scheme combined with mesh refinement to enable the simulation of larger number of time steps. We present results of up to a 32× increase in speed for a model system consisting of a cylinder with conditions for laminar flow. The parallel gain obtainable is predicted with strong accuracy, providing a quantitative understanding of the potential impact of this method. © 2014 Elsevier Inc.

Full Text

Duke Authors

Cited Authors

  • Randles, A; Kaxiras, E

Published Date

  • August 1, 2014

Published In

Volume / Issue

  • 270 /

Start / End Page

  • 577 - 586

Electronic International Standard Serial Number (EISSN)

  • 1090-2716

International Standard Serial Number (ISSN)

  • 0021-9991

Digital Object Identifier (DOI)

  • 10.1016/j.jcp.2014.04.006

Citation Source

  • Scopus