Analysis and implementation of the gas-kinetic BGK scheme for computational gas dynamics

Chongam Kim, Kun Xu, Luigi Martinelli, Antony Jameson

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Gas-kinetic schemes based on the BGK model are proposed as an alternative evolution model which can cure some of the limitations of current Riemann solvers. To analyse the schemes, simple advection equations are reconstructed and solved using the gas-kinetic BGK model. Results for gas-dynamic application are also presented. The final flux function derived in this model is a combination of a gas-kinetic Lax-Wendroff flux of viscous advection equations and kinetic flux vector splitting. These two basic schemes are coupled through a non-linear gas evolution process and it is found that this process always satisfies the entropy condition. Within the framework of the LED (local extremum diminishing) principle that local maxima should not increase and local minima should not decrease in interpolating physical quantities, several standard limiters are adopted to obtain initial interpolations so as to get higher-order BGK schemes. Comparisons for well-known test cases indicate that the gas-kinetic BGK scheme is a promising approach in the design of numerical schemes for hyperbolic conservation laws.

Original languageEnglish (US)
Pages (from-to)21-49
Number of pages29
JournalInternational Journal for Numerical Methods in Fluids
Volume25
Issue number1
DOIs
StatePublished - Jul 15 1997

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

Keywords

  • Advection equations
  • Entropy condition
  • Gas evolution model
  • Gas-kinetic BGK schemes
  • Gas-kinetic Lax-Wendroff flux
  • Kinetic flux vector splitting
  • Local extremum diminishing
  • Non-linear hyperbolic systems

Fingerprint Dive into the research topics of 'Analysis and implementation of the gas-kinetic BGK scheme for computational gas dynamics'. Together they form a unique fingerprint.

  • Cite this