A numerical tool for the study of the hydrodynamic recovery of the Lattice Boltzmann Method

Guillaume Tauzin, Luca Biferale, Mauro Sbragaglia, Abhineet Gupta, Federico Toschi, Andreas Bartel, Matthias Ehrhardt

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

We investigate the hydrodynamic recovery of Lattice Boltzmann Method (LBM) by analyzing exact balance relations for energy and enstrophy derived from averaging the equations of motion on sub-volumes of different sizes. In the context of 2D isotropic homogeneous turbulence, we first validate this approach on decaying turbulence by comparing the hydrodynamic recovery of an ensemble of LBM simulations against the one of an ensemble of Pseudo-Spectral (PS) simulations. We then conduct a benchmark of LBM simulations of forced turbulence with increasing Reynolds number by varying the input relaxation times of LBM. This approach can be extended to the study of implicit subgrid-scale (SGS) models, thus offering a promising route to quantify the implicit SGS models implied by existing stabilization techniques within the LBM framework.

Original languageEnglish
Pages (from-to)241-250
Number of pages10
JournalComputers & Fluids
Volume172
DOIs
Publication statusPublished - 30 Aug 2018

Keywords

  • Hydrodynamics
  • Lattice Boltzmann Method
  • Turbulence modeling

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