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Nonlinear dynamics and numerical uncertainties in CFDThe application of nonlinear dynamics to improve the understanding of numerical uncertainties in computational fluid dynamics (CFD) is reviewed. Elementary examples in the use of dynamics to explain the nonlinear phenomena and spurious behavior that occur in numerics are given. The role of dynamics in the understanding of long time behavior of numerical integrations and the nonlinear stability, convergence, and reliability of using time-marching, approaches for obtaining steady-state numerical solutions in CFD is explained. The study is complemented with spurious behavior observed in CFD computations.
Document ID
19960049992
Acquisition Source
Ames Research Center
Document Type
Technical Memorandum (TM)
Authors
Yee, H. C. (NASA Ames Research Center Moffett Field,CA United States)
Sweby, P. K. (NASA Ames Research Center Moffett Field,CA United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1996
Subject Category
Numerical Analysis
Report/Patent Number
NASA-TM-110398
NAS 1.15:110398
A-96173
Accession Number
96N34118
Funding Number(s)
PROJECT: RTOP 505-59-53
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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