Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.coastaleng.2003.11.005
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dc.titleA numerical study of solitary wave interaction with rectangular obstacles
dc.contributor.authorLin, P.
dc.date.accessioned2014-06-16T09:33:36Z
dc.date.available2014-06-16T09:33:36Z
dc.date.issued2004-03
dc.identifier.citationLin, P. (2004-03). A numerical study of solitary wave interaction with rectangular obstacles. Coastal Engineering 51 (1) : 35-51. ScholarBank@NUS Repository. https://doi.org/10.1016/j.coastaleng.2003.11.005
dc.identifier.issn03783839
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/54675
dc.description.abstractA well-validated numerical model is employed to study solitary wave interaction with rectangular obstacles. The characteristics of wave transformation in terms of wave reflection, transmission, and dissipation (RTD) coefficients are investigated for various combination of obstacle length a and height b . Considering that a solitary wave will go through the fission process over a long obstacle or step, during which the wave profile continuously evolves that makes it difficult to define the transmission coefficient based on wave heights, we propose the integration of energy flux for the calculation of wave coefficients. A general integral energy equation is derived that serves as the basis of calculating RTD coefficients. This method is applied in this study for the obstacles with 0< b/h <1+2 H/h and 0< a/h <∞ (where H is the wave height and h is the deep water depth), which cover the full range of structural type from a submerged obstacle to an emerged obstacle and from a thin plate to a step. For waves on steps, the present numerical results agree excellently with Lamb's [Lamb, H., 1932. Hydrodynamics, 6th Ed. Dover, New York] theory based on the long wave approximations and Seabra-Santos et al.'s [J. Fluid Mech. 176 (1987) 117] experimental data for both weakly nonlinear and fully nonlinear waves. The "edge-layer" theory developed by Sugimoto et al. [J. Phys. Soc. Jpn. 56 (1987) 1717], however, underestimates wave reflection significantly. For waves over obstacles, only the weakly nonlinear waves H/h =0.1 are considered. The RTD coefficients for different a/h and b/h are calculated and tabulated for the purpose of engineering application. The major differences between waves on a step and on a long obstacle are highlighted. The role of energy dissipation is explored and it is found that it can consume up to 60% of the total energy. The energy dissipation is mainly caused by vortex shedding and wave breaking that reduces wave transmission but has little impact on wave reflection. © 2004 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.coastaleng.2003.11.005
dc.sourceScopus
dc.subjectDissipation
dc.subjectEnergy flux
dc.subjectRectangular obstacle
dc.subjectReflection
dc.subjectSolitary wave
dc.subjectStep
dc.subjectTransmission
dc.typeArticle
dc.contributor.departmentCIVIL ENGINEERING
dc.description.doi10.1016/j.coastaleng.2003.11.005
dc.description.sourcetitleCoastal Engineering
dc.description.volume51
dc.description.issue1
dc.description.page35-51
dc.description.codenCOEND
dc.identifier.isiut000221032700003
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