Newton-Krylov algorithm with a loosely coupled turbulence model for aerodynamic flows
Newton-Krylov algorithm with a loosely coupled turbulence model for aerodynamic flows
A fast Newton–Krylov algorithm is presented that solves the turbulent Navier–Stokes equations on unstructured
2-D grids. The model of Spalart and Allmaras provides the turbulent viscosity and is loosely coupled to the mean-flow
equations. It is often assumed that the turbulence model must be fully coupled to obtain the full benefit of an inexact
Newton algorithm. We demonstrate that a loosely coupled algorithm is effective and has some advantages, such as
reduced storage requirements and smoother transient oscillations. A transonic single-element case converges to
1 1012 in 90 s on recent commodity hardware, whereas the lift coefficient is converged to three figures in one
quarter of that time.
980-987
Blanco, Max
0982c1ea-7595-4ff8-8ba6-76522ae88e53
Zingg, David W.
2d3068e5-c51b-4a28-96e6-064eb80b3099
May 2007
Blanco, Max
0982c1ea-7595-4ff8-8ba6-76522ae88e53
Zingg, David W.
2d3068e5-c51b-4a28-96e6-064eb80b3099
Blanco, Max and Zingg, David W.
(2007)
Newton-Krylov algorithm with a loosely coupled turbulence model for aerodynamic flows.
AIAA Journal, 45 (5), .
(doi:10.2514/1.22972).
Abstract
A fast Newton–Krylov algorithm is presented that solves the turbulent Navier–Stokes equations on unstructured
2-D grids. The model of Spalart and Allmaras provides the turbulent viscosity and is loosely coupled to the mean-flow
equations. It is often assumed that the turbulence model must be fully coupled to obtain the full benefit of an inexact
Newton algorithm. We demonstrate that a loosely coupled algorithm is effective and has some advantages, such as
reduced storage requirements and smoother transient oscillations. A transonic single-element case converges to
1 1012 in 90 s on recent commodity hardware, whereas the lift coefficient is converged to three figures in one
quarter of that time.
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Published date: May 2007
Organisations:
Aerodynamics & Flight Mechanics, Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 52607
URI: http://eprints.soton.ac.uk/id/eprint/52607
ISSN: 0001-1452
PURE UUID: 02a3a983-b8b2-4213-961b-76564d64779d
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Date deposited: 18 Jul 2008
Last modified: 15 Mar 2024 10:38
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Contributors
Author:
Max Blanco
Author:
David W. Zingg
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