Scattering theory and cancellation of gravity-flexural waves of floating plates

Mohamed Farhat, P. Y. Chen, Hakan Bagci, Khaled N. Salama, A. Alù, S. Guenneau

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We combine theories of scattering for linearized water waves and flexural waves in thin elastic plates to characterize and achieve control of water wave scattering using floating plates. This requires manipulating a sixth-order partial differential equation with appropriate boundary conditions of the velocity potential. Making use of multipole expansions, we reduce the scattering problem to a linear algebraic system. The response of a floating plate in the quasistatic limit simplifies, considering a distinct behavior for water and flexural waves. Unlike for similar studies in electromagnetics and acoustics, scattering of gravity-flexural waves results in a nonvanishing scattering cross-section in the zero-frequency limit, dominated by its zeroth-order multipole. Potential applications lie in floating structures manipulating ocean water waves.
Original languageEnglish (US)
JournalPhysical Review B
Issue number1
StatePublished - Jan 28 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank anonymous referees for their useful comments that helped improve the presentation of this work. S.G. wishes to thank the Department of Mathematics at Imperial College London for a visiting position in the group of Prof. R.V. Craster in 2018-2019 (funded by EP-SRC grant EP/L024926/1).


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