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An efficient scaled boundary FEM model for wave interaction with a nonuniform porous cylinder

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

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Abstract

The scaled boundary finite-element method (SBFEM) by Tao et al. (Comput. Methods Appl. Mech. Engrg 2007; 197:232-242) is only applicable for wave scattering problems by a structure of homogenous material. In this paper, the SBFEM is extended to deal with the interaction of water waves and porous offshore structure with a partially solid wall or opening. The cylindrical structure is considered as a circular cylinder of anisotropic material in the form of variable porosity. A central feature of the newly extended method is that the non-homogenous term caused by the complex configuration of the structure is processed by introducing a variable porous-effect parameter G. This leads to the final scaled boundary finite-element equation is still homogenous and can be solved in a similar manner. The modified SBFEM thus remains a semi-analytical fundamental-solution-less method. Numerical experiments in water wave interaction with a typical coastal/offshore structure - a cylinder with a partially solid wall or opening attest to the efficacy and accuracy of the proposed approach.

Publication metadata

Author(s): Song H, Tao L

Publication type: Article

Publication status: Published

Journal: International Journal for Numerical Methods in Fluids

Year: 2010

Volume: 63

Issue: 1

Pages: 96-118

Date deposited: 29/04/2010

ISSN (print): 0271-2091

ISSN (electronic): 1097-0363

Publisher: John Wiley & Sons Ltd.

URL: http://dx.doi.org/10.1002/fld.2080

DOI: 10.1002/fld.2080

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