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Hydrodynamic Coefficients for Straked Risers
Volume 6A: Pipeline and Riser Technology, 2014A considerable challenge in deep water field developments is the possibility of Vortex Induced Vibrations (VIV) of flexible risers due to presence of high currents. The most common remedy is the use of VIV suppression devices such as helical strakes. The background for this study is the lack of guidelines for estimation of hydrodynamic ...
Arne Nestegård +2 more
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Experimental determination of the hydrodynamic coefficients of an underwater manipulator
Journal of Robotic Systems, 1999A single degree-of-freedom (DOF) manipulator arm with a rectangular cross section is built to investigate the hydrodynamic effects, including drag force, added mass, and the moments induced by these forces. The drag–velocity relationships (linear and angular) are experimentally established and the drag force/moment coefficients are deduced.
Chen-Chou Lin +2 more
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Hydrodynamic friction coefficients of coated spherical particles
The Journal of Chemical Physics, 2009The complete set of hydrodynamic friction coefficients for a spherical particle coated with a porous layer and immersed in a viscous fluid is evaluated in analytic form. The coefficients allow the calculation of the flow disturbance caused by the coated particle for any incident flow which satisfies the creeping flow equations.
B, Cichocki, B U, Felderhof
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Optimization of Hydrodynamic Coefficients for VIV Prediction
Volume 8: CFD and FSI, 2021Abstract Vortices generated when flow pass offshore slender structures may cause structural vibrations due to fluid-structure interaction, termed vortex-induced vibrations (VIV). VIV can cause severe accumulated fatigue damage, which need to be considered in the structure design.
Decao Yin +13 more
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Review of Hydrodynamic Coefficients for Riser Design
Offshore Technology Conference, 2022Abstract A literature review of experimental and computational hydrodynamic research is presented with the objective of highlighting the parameters that affect riser added mass coefficient (Ca) and drag coefficient (Cd). Typical riser analysis is conducted assuming constant values of hydrodynamic coefficients.
Dhyanjyoti Deka +3 more
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Hydrodynamic Coefficients For Macrd-Roughnesses
Offshore Technology Conference, 1981ABSTRACT Consideration is given to the drag of cylinders in fluid flow as influenced from the very large and lumpy roughnesses of marine growths. A means of characterizing the effective diameter is based on the Strouhal number of the roughened cylinder.
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Hydrodynamic coefficients for calculation of hydrodynamic loads on offshore truss structures
Marine Structures, 1996Abstract The current American Petroleum Institute's recipe [API RP 2A WSD, Recommended practice for planning, designing and constructing fixed offshore platforms, working stress design. API, USA, 1993.] for calculation of hydrodynamic loads on offshore truss structures is compared with the corresponding North Sea Design Practice, as given by the ...
Ove T. Gudmestad, Geir Moe
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On the assessment of hydrodynamic coefficients of cylinders in heaving
Ocean Engineering, 1997A detailed comparison is made of the common two-dimensional methods for the evaluation of the hydrodynamic coefficients. Special attention was given to the conformal transformation method and the parameters which influence the accuracy of this method are studied.
J. Ramos, C. Guedes Soares
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Hydrodynamic coefficients of a harmonically oscillated tower
Applied Ocean Research, 1983Abstract A tower hinged at the bottom was oscillated mechanically in a sinusoidal fashion in a plane in still water. An instrumented section in the tower measured the inline and transverse forces locally on the tower due to the hydrodynamic effects.
Subrata K. Chakrabarti +2 more
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Hydrodynamic coefficients for vertical composite cylinders
Ocean Engineering, 1984Abstract An efficient method of calculation for vertical, composite cylinders at finite depth is presented. Hydrodynamic coefficients calculated by this method are compared with numerical results obtained by a surface element method.
S.M. Calisal, T. Sabuncu
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