NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Coarsening Strategies for Unstructured Multigrid Techniques with Application to Anisotropic ProblemsOver the years, multigrid has been demonstrated as an efficient technique for solving inviscid flow problems. However, for viscous flows, convergence rates often degrade. This is generally due to the required use of stretched meshes (i.e. the aspect-ratio AR = (delta)y/(delta)x much less than 1) in order to capture the boundary layer near the body. Usual techniques for generating a sequence of grids that produce proper convergence rates on isotropic meshes are not adequate for stretched meshes. This work focuses on the solution of Laplace's equation, discretized through a Galerkin finite-element formulation on unstructured stretched triangular meshes. A coarsening strategy is proposed and results are discussed.
Document ID
19970006608
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Morano, E.
(Institute for Computer Applications in Science and Engineering Hampton, VA United States)
Mavriplis, D. J.
(Institute for Computer Applications in Science and Engineering Hampton, VA United States)
Venkatakrishnan, V.
(Institute for Computer Applications in Science and Engineering Hampton, VA United States)
Date Acquired
August 17, 2013
Publication Date
September 1, 1996
Publication Information
Publication: Seventh Copper Mountain Conference on Multigrid Methods
Subject Category
Numerical Analysis
Accession Number
97N13537
Funding Number(s)
CONTRACT_GRANT: NAS1-19480
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available