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    Hydrodynamic Forces on a Marine Riser: A Velocity-Potential Method

    Source: Journal of Energy Resources Technology:;1982:;volume( 104 ):;issue: 001::page 53
    Author:
    J. S. Chung
    DOI: 10.1115/1.3230380
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A linear equation is mathematically derived for hydrodynamic forces on a marine riser under effects of free surface and floating-vessel motion using a velocity-potential method. It accounts for inertia and wave damping forces, including the force caused by riser motion, and empirically includes the drag force caused by viscosity. The equation, when reduced to a simpler form, is basically identical to the semi-empirical Morison equation for the inertia and drag forces. Theoretical validity of the simpler equation and the Morison equation is discussed. Previously, practical, semi-empirical force equations on the riser have been suggested, ignoring the effects of the free surface and the wave damping. The equations in current practice are compared with the present simpler equation.
    keyword(s): Fluid-dynamic forces , Marine drilling risers , Equations , Force , Motion , Drag (Fluid dynamics) , Waves , Pipeline risers , Damping , Morison equation , Inertia (Mechanics) , Vessels AND Viscosity ,
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      Hydrodynamic Forces on a Marine Riser: A Velocity-Potential Method

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    http://yetl.yabesh.ir/yetl1/handle/yetl/95710
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    contributor authorJ. S. Chung
    date accessioned2017-05-08T23:13:07Z
    date available2017-05-08T23:13:07Z
    date copyrightMarch, 1982
    date issued1982
    identifier issn0195-0738
    identifier otherJERTD2-26385#53_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/95710
    description abstractA linear equation is mathematically derived for hydrodynamic forces on a marine riser under effects of free surface and floating-vessel motion using a velocity-potential method. It accounts for inertia and wave damping forces, including the force caused by riser motion, and empirically includes the drag force caused by viscosity. The equation, when reduced to a simpler form, is basically identical to the semi-empirical Morison equation for the inertia and drag forces. Theoretical validity of the simpler equation and the Morison equation is discussed. Previously, practical, semi-empirical force equations on the riser have been suggested, ignoring the effects of the free surface and the wave damping. The equations in current practice are compared with the present simpler equation.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleHydrodynamic Forces on a Marine Riser: A Velocity-Potential Method
    typeJournal Paper
    journal volume104
    journal issue1
    journal titleJournal of Energy Resources Technology
    identifier doi10.1115/1.3230380
    journal fristpage53
    journal lastpage57
    identifier eissn1528-8994
    keywordsFluid-dynamic forces
    keywordsMarine drilling risers
    keywordsEquations
    keywordsForce
    keywordsMotion
    keywordsDrag (Fluid dynamics)
    keywordsWaves
    keywordsPipeline risers
    keywordsDamping
    keywordsMorison equation
    keywordsInertia (Mechanics)
    keywordsVessels AND Viscosity
    treeJournal of Energy Resources Technology:;1982:;volume( 104 ):;issue: 001
    contenttypeFulltext
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