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Numerical Simulations of Wake/Boundary Layer InteractionsDirect and large-eddy simulations of the interaction between the wake of a circular cylinder and a flat-plate boundary layer are conducted. Two Reynolds numbers are examined. The simulations indicate that at the lower Reynolds number the boundary layer is buffeted by the unsteady Karman vortex street shed by the cylinder. The fluctuations, however, cannot be self-sustained due to the low Reynolds-number, and the flow does not reach a turbulent state within the computational domain. In contrast, in the higher Reynolds-number case, boundary-layer fluctuations persist after the wake has decayed (due, in part, to the higher values of the local Reynolds number Re(sub theta) achieved in this case); some evidence could be observed that a self-sustaining turbulence generation cycle was beginning to be established.
Document ID
20040111289
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Piomelli, Ugo (Maryland Univ. College Park, MD, United States)
Choudhari, Meelan M. (NASA Langley Research Center Hampton, VA, United States)
Ovchinnikov, Victor (Maryland Univ. College Park, MD, United States)
Balaras, Elias (Maryland Univ. College Park, MD, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2003
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
AIAA Paper 2003-0975
Meeting Information
Meeting: 41st Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 6, 2003
End Date: January 9, 2003
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAG1-2285
Distribution Limits
Public
Copyright
Public Use Permitted.

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