NDLI: Hydrodynamics of a body floating in a two-layer fluid of finite depth. Part 2. Diffraction problem and wave-induced motions

Content Provider	Springer Nature Link
Author	Kashiwagi, Masashi Ten, Igor Yasunaga, Makoto
Copyright Year	2006
Abstract	A linearized two-dimensional diffraction problem in a two-layer fluid of finite depth was solved for a general floating body and relevant wave-induced motions were studied. In a two-layer fluid, for a prescribed frequency, incident waves propagate with two different wave modes. Thus the wave-exciting forces and resulting motions must be computed separately for each mode of the incident wave. The boundary integral equation method developed by the authors in the Part-1 article was applied to directly obtain the diffraction potential (pressure) on the body surface. With the computed results, an investigation was carried out on the effects of the fluid density ratio and the interface position on the wave-exciting forces on the body and the motions of the body, including the case in which the body intersects the interface. By a systematic derivation using Green's theorem, all the possible reciprocity relations were derived theoretically in explicit forms for a system of finite depth; these relations were confirmed to be satisfied numerically with very good accuracy. Experiments were also carried out using water and isoparaffin oil as the two fluids and a Lewis-form body. Measured results for the sway- and heave-exciting forces and the heave motion were compared with the computed results, and a favorable agreement was found.
Starting Page	150
Ending Page	164
Page Count	15
File Format	PDF
ISSN	09484280
Journal	Journal of Marine Science and Technology
Volume Number	11
Issue Number	3
e-ISSN	14378213
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-09-27
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Two-layer fluid Surface-wave mode Internal-wave mode Diffraction problem Wave-induced motions Finite water depth Engineering Fluid Dynamics Mechanical Engineering Engineering Design Automotive and Aerospace Engineering, Traffic Offshore Engineering
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering Mechanics of Materials Mechanical Engineering

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