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Preconditioning Methods for Low-Speed Flows.

Turkel, E.*) and Vatsa, V.N.**) and Radespiel, R. (1996) Preconditioning Methods for Low-Speed Flows. In: AIAA-paper 96-2460-CP. 14th AIAA Applied Aerodynamics Conference, June 18-20, 1996, New Orleans, LA.

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Abstract

We consider the steady-state equations for a compressible fluid. For low-speed flow, the system is stiff because the ratio of the convective speed to the speed of sound is quite small. To overcome the difficulty, we alter the time evolution of the equations but retain the same steady-state analytic equations. To achieve high numerical resolution, we also alter the artifical viscosity of the numerical scheme, which is implemented conveniently by using other sets of variables in addition to the conservative variables. We investigate the effect of the artificial dissipation within this preconditioned system. We consider both the nonconservative and conservative formulations for artificial viscosity and examine their effect on the accuracy and convergence of the numerical solutions. The numerical results for viscous three-dimensional wing flows and two-dimensional multi-element airfoil flows indicate that efficient multigrid.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1996, pages=11,
Title:Preconditioning Methods for Low-Speed Flows.
Authors:
AuthorsInstitution or Email of Authors
Turkel, E.*)UNSPECIFIED
Vatsa, V.N.**)UNSPECIFIED
Radespiel, R.UNSPECIFIED
Date:1996
Journal or Publication Title:AIAA-paper 96-2460-CP
Status:Published
Keywords:Navier-Stokes, incompressible Flow, multigrid, preconditioning
Event Title:14th AIAA Applied Aerodynamics Conference, June 18-20, 1996, New Orleans, LA
HGF - Research field:UNSPECIFIED
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:UNSPECIFIED
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Grundlagen Raumtransport - Anlagen und Messtechnik (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:06

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