NDLI: Implicit/multigrid algorithms for incompressible turbulent flows on unstructured grids

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Implicit/multigrid algorithms for incompressible turbulent flows on unstructured grids

Content Provider	NASA Technical Reports Server (NTRS)
Author	Anderson, W. Kyle Bonhaus, Daryl L. Rausch, Russ D.
Copyright Year	1997
Description	An implicit code for computing inviscid and viscous incompressible flows on unstructured grids is described. The foundation of the code is a backward Euler time discretization for which the linear system is approximately solved at each time step with either a point implicit method or a preconditioned Generalized Minimal Residual (GMRES) technique. For the GMRES calculations, several techniques are investigated for forming the matrix-vector product. Convergence acceleration is achieved through a multigrid scheme that uses non-nested coarse grids that are generated using a technique described in the present paper. Convergence characteristics are investigated and results are compared with an exact solution for the inviscid flow over a four-element airfoil. Viscous results, which are compared with experimental data, include the turbulent flow over a NACA 4412 airfoil, a three-element airfoil for which Mach number effects are investigated, and three-dimensional flow over a wing with a partial-span flap.
File Size	2764588
Page Count	15
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20040110438
Archival Resource Key	ark:/13960/t0qr9rf64
Language	English
Publisher Date	1997-01-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Thermodynamics Triangulation Turbulent Flow Multigrid Methods Computational Fluid Dynamics Unstructured Grids Mathematics Pressure Distribution Boundary Conditions Airfoils Velocity Distribution Incompressible Flow Wings Algorithms Turbulence Models Isotropic Turbulence Eigenvectors Matrices Mathematics Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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