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Perfect active absorption of water waves in a channel by a dipole source

Published online by Cambridge University Press:  12 August 2024

Léo-Paul Euvé Open the ORCID record for Léo-Paul Euvé [Opens in a new window] ,
Kim Pham Open the ORCID record for Kim Pham [Opens in a new window] ,
Philippe Petitjeans Open the ORCID record for Philippe Petitjeans [Opens in a new window] ,
Vincent Pagneux Open the ORCID record for Vincent Pagneux [Opens in a new window]  and
Agnès Maurel Open the ORCID record for Agnès Maurel [Opens in a new window]
Léo-Paul Euvé*
Affiliation:
Lab. de Physique et Mécanique des Milieux Hétérogènes (PMMH), ESPCI-PSL, CNRS, Sorbonne University, Univ. Paris Cité, 7 quai Saint Bernard, 75005 Paris, France
Kim Pham
Affiliation:
LMI, ENSTA Paris, Institut Polytechnique de Paris, 91120 Palaiseau, France
Philippe Petitjeans
Affiliation:
Lab. de Physique et Mécanique des Milieux Hétérogènes (PMMH), ESPCI-PSL, CNRS, Sorbonne University, Univ. Paris Cité, 7 quai Saint Bernard, 75005 Paris, France
Vincent Pagneux
Affiliation:
Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique – Graduate School (IA-GS), CNRS, 72085 Le Mans Université, France
Agnès Maurel
Affiliation:
Institut Langevin, ESPCI Paris, PSL University, CNRS, 1 rue Jussieu, 75005 Paris, France
*
†Email address for correspondence: leo-paul.euve@espci.fr
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Abstract

This study investigates the potential use of an active device to efficiently absorb water waves propagating in a channel. The active device comprises a dipole source consisting of two sources in quasi-opposition of phase. We explore the feasibility of this approach to achieve perfect absorption of guided waves through interference phenomena. To accomplish this, we establish the law governing the waves emitted by the dipole source to optimize the absorption of specific incident waves. The validity of this law is demonstrated through numerical simulations and laboratory experiments, encompassing both the harmonic and transient regimes of the experimental set-up.

JFM classification

Waves/Free-surface Flows: Surface gravity waves Waves/Free-surface Flows: Wave scattering
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 990 , 10 July 2024 , A9
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Copyright
© The Author(s), 2024. Published by Cambridge University Press

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