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Numerical and Experimental Evaluation of Lift Forces in Flows Around Surface-Mounted Bluff Bodies

[+] Author Affiliations
T. Stengel, F. Ebert, M. Fallen

University of Kaiserslautern, Kaiserslautern, Germany

Paper No. FEDSM2002-31109, pp. 1285-1292; 8 pages
doi:10.1115/FEDSM2002-31109
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 2: Symposia and General Papers, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3616-9 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

The flow around a surface-mounted bluff body with cuboid shape is investigated. Therefore, the velocity field including the distribution of the turbulent kinetic energy is computed and compared with experimental Laser Doppler Anemometry data. Several different turbulence models, namely the standard k-ε model, the Wolfshtein two-layer k-ε model and a Large-Eddy approach are validated. Since the Large-Eddy model remains the only model representing the flow accurate, it is chosen for further investigations. The pressure distribution on the body and on the carrying surface around the body is analysed. The lift coefficients are computed for Reynolds numbers, ranging from 1.1 × 104 up to 4.4 × 104 . The lengths of the separation zone above and the recirculation zone downstream the body are evaluated.

Copyright © 2002 by ASME

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