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Scaled boundary FEM model for interaction of short-crested waves with a concentric porous cylindrical structure

Lookup NU author(s): Professor Longbin Tao, Dr Hao Song

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Abstract

This paper describes the development of an efficient scaled boundary finite-element model (SBFEM) for the simulation of short-crested wave interaction with a concentric porous cylindrical structure. By weakening the governing differential equation in the circumferential direction, the SBFEM is able to solve analytically the weakened equation in the radial direction. Only the cylinder boundary on the circumference of the exterior porous cylinder is discretized with curved surface finite-elements, while a complete analytical representation is obtained for the radial differential equation. Comparisons of the numerical results on wave diffraction forces and surface wave elevations at the cylinder to available analytical solutions demonstrate that excellent accuracy can be achieved by the SBFEM with a very small number of surface finite-elements. The influence of varying the wave parameters as well as the system configuration on the system hydrodynamics, including the wave force, wave run-up and diffracted wave contour is examined and extensive results on them are presented. This parametric study will help determine the various hydrodynamic effects of a concentric porous cylindrical structure.

Publication metadata

Author(s): Tao L, Song H, Chakrabarti S

Publication type: Article

Publication status: Published

Journal: Journal of Waterway, Port, Coastal, and Ocean Engineering

Year: 2009

Volume: 135

Issue: 5

Pages: 200-212

Date deposited: 30/04/2010

ISSN (print): 0733-950X

ISSN (electronic): 1943-5460

Publisher: American Society of Civil Engineers

URL: http://dx.doi.org/10.1061/(ASCE)0733-950X(2009)135:5(200)

DOI: 10.1061/(ASCE)0733-950X(2009)135:5(200)

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