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Multigrid schemes for viscous hypersonic flowsSeveral multigrid schemes are considered for the numerical computation of viscous hypersonic flows. For each scheme, the basic solution algorithm employs upwind spatial discretization with explicit multistage time stepping. Two-level versions of the various multigrid algorithms are applied to the two-dimensional advection equation, and Fourier analysis is used to determine their damping properties. The capabilities of the multigrid methods are assessed by solving two different hypersonic flow problems. Some new multigrid schemes, based on semicoarsening strategies, are shown to be quite effective in relieving the stiffness caused by the high-aspect-ratio cells required to resolve high Reynolds number flows. These schemes exhibit good convergence rates for Reynolds numbers up to 200 x 10(exp 6).
Document ID
19940017000
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Swanson, R. C. (NASA Langley Research Center Hampton, VA, United States)
Radespiel, R. (Deutsche Forschungs- und Versuchsanstalt fuer Luft- und Raumfahrt Brunswick, Germany)
Date Acquired
September 6, 2013
Publication Date
November 1, 1993
Publication Information
Publication: The Sixth Copper Mountain Conference on Multigrid Methods, Part 2
Subject Category
Aerodynamics
Accession Number
94N21473
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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