Analysis of stationary iterative methods for the discrete convection-diffusion equation with a 9-point compact scheme

Samir Karaa, Jun Zhang

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We study the convergence of point and line stationary iterative methods for solving the linear system arising from a fourth-order 9-point compact finite difference discretization of the two-dimensional convection-diffusion equation with constant coefficients. We present new techniques to bound the spectral radii of iteration matrices in terms of the cell Reynolds numbers. We also derive analytic formulas for the spectral radii for special values of the cell Reynolds numbers and study asymptotic behaviors of the analytic bounds. The results provide rigorous justification for the numerical experiments conducted elsewhere, which show good stability for the fourth-order compact scheme. In addition, we compare the 9-point scheme with the traditional 5-point difference discretization schemes and conduct some numerical experiments to supplement our analyses.

Original languageEnglish
Pages (from-to)447-476
Number of pages30
JournalJournal of Computational and Applied Mathematics
Volume154
Issue number2
DOIs
Publication statusPublished - May 15 2003

Keywords

  • Convection-diffusion equation
  • Fourth-order compact scheme
  • Iterative methods
  • Linear systems
  • Spectral radius

ASJC Scopus subject areas

  • Applied Mathematics
  • Computational Mathematics
  • Numerical Analysis

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