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Assessment of Preconditioning Methods for Multidimensional Aerodynamics

Turkel, E. and Radespiel, R. and Kroll, N. (1997) Assessment of Preconditioning Methods for Multidimensional Aerodynamics. Computers and Fluids, Vol. 26, No. 6., pp. 613-634.

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Abstract

We consider the steady equations for a compressible fluid. For low speed flow the system is stiff since the ratio of the convective speed of sound is very small. To overcome this difficulty we alter the time dependency of the equations while retaining the same steady state operator. In order to achieve high numerical resolution we also alter the artificial dissipation of the numerical scheme. The definition of preconditioners and artificial dissipation terms can be formulated conveniently by using other sets of dependent variables rather than the conservative variables. The effects of different preconditioners, artificial dissipation and grid density onaccuracy and convergence to the steady state of the numerical solutions are presented in detail. The numerical results obtained for inviscid and viscous 2D and 3D flows over external aerodynamic bodies indicate that efficient multigrid computations of flows with very low Mach numbers are now possible (see also 3).

Document Type:Article
Additional Information: LIDO-Berichtsjahr=1997,
Title:Assessment of Preconditioning Methods for Multidimensional Aerodynamics
Authors:
AuthorsInstitution or Email of Authors
Turkel, E.UNSPECIFIED
Radespiel, R.UNSPECIFIED
Kroll, N.UNSPECIFIED
Date:1997
Journal or Publication Title:Computers and Fluids, Vol. 26, No. 6.
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 613-634
Status:Published
Keywords:Preconditioning, Navier-Stokes Equation, Euler Equation, Artificial Dissipation
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L SI - Versuchs- und Simulationstechniken
DLR - Research theme (Project):L - Concepts & Integration
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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