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  • Spacing effects on hydrodynamics of heave plates on offshore structures

    Author(s)
    Tao, Longbin
    Molin, B.
    Scolan, Y.
    Thiagarajan, K.
    Griffith University Author(s)
    Tao, Longbin
    Year published
    2007
    Metadata
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    Abstract
    The nonlinear viscous flow problem associated with a heaving vertical cylinder with two heave plates in the form of two circular disks attached is solved using a finite difference method. Numerical experiments are carried out to investigate the spanwise length effects on the hydrodynamic properties, such as added mass and damping coefficients. Over a Keulegan-Carpenter (KC) number range from 0.1 to 0.6 at frequency parameter (beta = 7.869 X 10^7), calculations indicate that a KC-dependent critical value of spanwise length L/D_d (L - the distance between the disks, and D_d - the diameter of the disks) exists. A significant ...
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    The nonlinear viscous flow problem associated with a heaving vertical cylinder with two heave plates in the form of two circular disks attached is solved using a finite difference method. Numerical experiments are carried out to investigate the spanwise length effects on the hydrodynamic properties, such as added mass and damping coefficients. Over a Keulegan-Carpenter (KC) number range from 0.1 to 0.6 at frequency parameter (beta = 7.869 X 10^7), calculations indicate that a KC-dependent critical value of spanwise length L/D_d (L - the distance between the disks, and D_d - the diameter of the disks) exists. A significant influence of L/D_d on the vortex shedding patterns around the disks and the hydrodynamic coefficients is revealed when L/D_d is smaller than the critical value due to strong interaction between vortices of different disks. Beyond that limit, however, both added mass and damping coefficients are shown to be rather stable, indicating the independence of the vortex shedding processes of different disks.
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    Journal Title
    journal of fluids and structures
    Volume
    23
    Issue
    8
    Publisher URI
    http://www.elsevier.com/wps/find/journaldescription.cws_home/622877/description#description
    DOI
    https://doi.org/10.1016/j.jfluidstructs.2007.03.004
    Subject
    Engineering
    Publication URI
    http://hdl.handle.net/10072/18257
    Collection
    • Journal articles

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