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Wind and Structures
  Volume 2, Number 4, December 1999 , pages 285-303

Computation of unsteady wind loading on bluff bodies using a discrete vortex method
I.J. Taylor and M. Vezza

    A discrete vortex method (DVM) has been developed at the Department of Aerospace Engineering, University of Glasgow, to predict unsteady, incompressible, separated flows around closed bodies. The basis of the method is the discretisation of the vorticity field, rather than the velocity field, into a series of vortex particles that are free to move in the flow. This paper gives a brief description of the method and presents the results of calculations on static and transversely oscilating square section cylinders. The results demonstrate that the method successfully predicts the character of the flow field at different angles of incidence for the static case. Vortex lock-in around the resonance point is successfully captured in the oscillatory cases. It is concluded that the vortex method results show good agreement, both qualitatively and quantitatively, with results from various experimental data.
Key Words
    vortex method; bluff bodies; square cylinder; vortex-induced vibration.
Department of Aerospace Engineering, University of Glasgow, G12 8QQ, U.K.

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