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Secondary frequencies in the wake of a circular cylinder with vortex sheddingA detailed numerical study of two-dimensional flow past a circular cylinder at moderately low Reynolds numbers was conducted using three different numerical algorithms for solving the time-dependent compressible Navier-Stokes equations. It was found that if the algorithm and associated boundary conditions were consistent and stable, then the major features of the unsteady wake were well-predicted. However, it was also found that even stable and consistent boundary conditions could introduce additional periodic phenomena reminiscent of the type seen in previous wind-tunnel experiments. However, these additional frequencies were eliminated by formulating the boundary conditions in terms of the characteristic variables. An analysis based on a simplified model provides an explanation for this behavior.
Document ID
19900013224
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Abarbanel, Saul S.
(Tel-Aviv Univ. (Israel). Providence, RI., United States)
Don, Wai Sun
(Brown Univ. Providence, RI., United States)
Gottlieb, David
(Brown Univ. Hampton, VA., United States)
Rudy, David H.
(NASA Langley Research Center Hampton, VA, United States)
Townsend, James C.
(Institute for Computer Applications in Science and Engineering)
Date Acquired
September 6, 2013
Publication Date
February 1, 1990
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.26:181998
NASA-CR-181998
ICASE-90-16
AD-A227099
Accession Number
90N22540
Funding Number(s)
CONTRACT_GRANT: NAS1-18605
CONTRACT_GRANT: NAS1-18107
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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