Hydrodynamic Forces on a Marine Riser: A Velocity-Potential MethodSource: Journal of Energy Resources Technology:;1982:;volume( 104 ):;issue: 001::page 53Author:J. S. Chung
DOI: 10.1115/1.3230380Publisher: 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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contributor author | J. S. Chung | |
date accessioned | 2017-05-08T23:13:07Z | |
date available | 2017-05-08T23:13:07Z | |
date copyright | March, 1982 | |
date issued | 1982 | |
identifier issn | 0195-0738 | |
identifier other | JERTD2-26385#53_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/95710 | |
description 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. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Hydrodynamic Forces on a Marine Riser: A Velocity-Potential Method | |
type | Journal Paper | |
journal volume | 104 | |
journal issue | 1 | |
journal title | Journal of Energy Resources Technology | |
identifier doi | 10.1115/1.3230380 | |
journal fristpage | 53 | |
journal lastpage | 57 | |
identifier eissn | 1528-8994 | |
keywords | Fluid-dynamic forces | |
keywords | Marine drilling risers | |
keywords | Equations | |
keywords | Force | |
keywords | Motion | |
keywords | Drag (Fluid dynamics) | |
keywords | Waves | |
keywords | Pipeline risers | |
keywords | Damping | |
keywords | Morison equation | |
keywords | Inertia (Mechanics) | |
keywords | Vessels AND Viscosity | |
tree | Journal of Energy Resources Technology:;1982:;volume( 104 ):;issue: 001 | |
contenttype | Fulltext |