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Convergence Acceleration on Unstructured Meshes

Rossow, C.-C. (2000) Convergence Acceleration on Unstructured Meshes. 12. DGLR-Fach-Symposium AG STAB, Stuttgart (de), 15.-17.11.2000.

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Abstract

An implicit residual smoothing technique to enhance convergence properties of Runge-Kutta time stepping schemes on unstructured meshes is developed. In contrast to standard implicit residual smoothing schemes applied on structured meshes, no direct information about the cell aspect ratio is required. The development of the acceleration technique is based on the Mach number based Advection Pressure Splitting (MAPS) spatial discretization. With the new implicit smoothing, maximum CFL numbers comparable to those on structured meshes are obtainable for unstructured meshes, and in combination with multigrid acceleration, convergence rates similar to structured codes are achieved. In order to allow the solution of incompressible flows, the implicit residual smoothing is adapted to low Mach number preconditioning.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2001,
Title:Convergence Acceleration on Unstructured Meshes
Authors:
AuthorsInstitution or Email of Authors
Rossow, C.-C.UNSPECIFIED
Date:2000
Status:Published
Keywords:Unstructured meshes, implicit residual smoothing, multigrid, Navier-Stokes equations
Event Title:12. DGLR-Fach-Symposium AG STAB, Stuttgart (de), 15.-17.11.2000
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
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: Claudia Grant
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 20:19

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