A Characteristic Boundary Condition for Multispeed Lattice Boltzmann Methods

Friedemann Klass (Corresponding author), Alessandro Gabbana, Andreas Bartel

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
90 Downloads (Pure)

Abstract

We present the development of a non-reflecting boundary condition, based on the Local One-Dimensional Inviscid (LODI) approach, for Lattice Boltzmann Models working with multi-speed stencils. We test and evaluate the LODI implementation with numerical benchmarks, showing significant accuracy gains with respect to the results produced by a simple zero-gradient condition. We also implement a simplified approach, which allows handling the unknown distribution functions spanning several layers of nodes in a unified way, still preserving a comparable level of accuracy with respect to the standard formulation.

Original languageEnglish
Pages (from-to)101-117
Number of pages17
JournalCommunications in Computational Physics
Volume33
Issue number1
DOIs
Publication statusPublished - 1 Jan 2023

Keywords

  • Characteristic boundary condition
  • lattice Boltzmann method
  • local one-dimensional inviscid boundary conditions
  • multispeed high order models
  • non-reflective boundary conditions

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