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Motion of a floating body in a harbour by domain decomposition method

Shi, YY; Li, ZF; Wu, GX; (2018) Motion of a floating body in a harbour by domain decomposition method. Applied Ocean Research , 78 pp. 223-240. 10.1016/j.apor.2018.06.015. Green open access

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Abstract

A three-dimensional domain decomposition method is used to solve the problem of wave interaction with a ship floating inside a harbour with arbitrary shape. The linearized velocity potential theory is adopted. The total fluid domain is divided into two sub-ones: one for the harbour and the other for the external open sea. Boundary integral equations together with the free surface Green function are used in the both domains. Matching conditions are imposed on the interface of the two sub-domains to ensure the velocity and pressure continuity. The advantage of the domain decomposition method over the single domain method is that it removes the coastal surface from the boundary integral equation. This subsequently removes the need for elements on the coastal wall when the equation is discretized. The accuracy of the method is demonstrated through convergence study and through the comparison with the published data. Extensive results through the hydrodynamic coefficients, wave exciting forces and ship motions are provided. Highly oscillatory behaviour is observed and its mechanism is discussed. Finally, the effects of incident wave direction, ship location as well as the harbour topography are investigated in detail.

Type: Article
Title: Motion of a floating body in a harbour by domain decomposition method
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.apor.2018.06.015
Publisher version: https://doi.org/10.1016/j.apor.2018.06.015
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: ship motion in a harbour; domain decomposition; three-dimensional boundary element method; free-surface Green function
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10052551
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