Multigrid and defect correction for the steady Navier-Stokes equations

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Abstract

Theoretical and experimental convergence results are presented for nonlinear multigrid and iterative defect correction applied to finite volume discretizations of the full, steady, 2D, compressible Navier-Stokes equations. Iterative defect correction is introduced for circumventing the difficulty in solving Navier-Stokes equations discretized with a second- or higher-order accurate convective part. By Fourier analysis applied to a model equation, an optimal choice is made for the operator to be inverted in the defect correction iteration. As a smoothing technique for the multigrid method, collective symmetric point Gauss-Seidel relaxation is applied with as the basic solution technique: exact Newton iteration applied to a continuously differentiable, first-order upwind discretization of the full Navier-Stokes equations. For non-smooth flow problems, the convergence results obtained are already competitive with those of well-established Navier-Stokes methods. For smooth flow problems, the present method performs better than any standard method. Here, first-order discretization error accuracy is attained in a single multigrid cycle, and second-order accuracy in only one defect correction cycle. The method contributes to the state of the art in efficiently computing compressible viscous flows.
Original languageEnglish
Pages (from-to)25-46
JournalJournal of Computational Physics
Volume87
Issue number1
DOIs
Publication statusPublished - 1 Mar 1990
Externally publishedYes

Keywords

  • Computational Fluid Dynamics
  • Finite Volume Method
  • Multigrid Methods
  • Navier-Stokes Equation
  • Steady Flow
  • Two Dimensional Flow
  • Compressible Flow
  • Convergence
  • Flat Plates
  • Iterative Solution
  • Supersonic Flow
  • Viscous Flow

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