CUED Publications database

Run-up of solitary waves on twin conical islands using a boussinesq model

Liang, D and Borthwick, AGL and Romer-Lee, JK (2011) Run-up of solitary waves on twin conical islands using a boussinesq model. Journal of Offshore Mechanics and Arctic Engineering, 134. ISSN 0892-7219

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Abstract

This paper investigates the interaction of solitary waves (representative of tsunamis) with idealized flat-topped conical islands. The investigation is based on simulations produced by a numerical model that solves the two-dimensional Boussinesq-type equations of Madsen and Sørensen using a total variation diminishing Lax-Wendroff scheme. After verification against published laboratory data on solitary wave run-up at a single island, the numerical model is applied to study the maximum run-up at a pair of identical conical islands located at different spacings apart for various angles of wave attack. The predicted results indicate that the maximum run-up can be attenuated or enhanced according to the position of the second island because of wave refraction, diffraction, and reflection. It is also observed that the local wave height and hence run-up can be amplified at certain gap spacing between the islands, owing to the interference between the incident waves and the reflected waves between islands. © 2012 American Society of Mechanical Engineers.

Item Type: Article
Uncontrolled Keywords: Boussinesq equations Shock-capturing Solitary wave Tsunami TVD
Subjects: UNSPECIFIED
Divisions: Div A > Fluid Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:23
Last Modified: 08 Dec 2014 02:37
DOI: 10.1115/1.4003394