Propagation and scattering of waves by dense arrays of impenetrable cylinders in a waveguide
| Autor: | Julien Touboul, Gwendoline Arnaud, V. Rey, Kostas Belibassakis |
|---|---|
| Přispěvatelé: | Department of marine structures School of naval architecture and marine engineering (NATIONAL TECHNICAL UNIVERSITY OF ATHENS), National Technical University of Athens [Athens] (NTUA), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Toulon (UTLN), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Scattering Applied Mathematics General Physics and Astronomy Boundary (topology) Mechanics 01 natural sciences [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation 6. Clean water 010305 fluids & plasmas [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Computational Mathematics Transmission (telecommunications) Modeling and Simulation Breakwater 0103 physical sciences Reflection (physics) Waveguide (acoustics) Wave tank Refractive index 0105 earth and related environmental sciences |
| Zdroj: | Wave Motion Wave Motion, 2018, 80, pp.1-19. ⟨10.1016/j.wavemoti.2018.03.007⟩ Wave Motion, Elsevier, 2018, 80, pp.1-19. ⟨10.1016/j.wavemoti.2018.03.007⟩ |
| ISSN: | 0165-2125 1878-433X |
| Popis: | International audience; A coupled numerical scheme, based on modal expansions and boundary integral representations , is developed for treating propagation and scattering by dense arrays of impenetrable cylinders inside a waveguide. Numerical results are presented and discussed concerning reflection and transmission, as well as the wave details both inside and outside the array. The method is applied to water waves propagating over an array of vertical cylinders in constant depth extended all over the water column, operating as a porous breakwater unit in a periodic arrangement (segmented breakwater). Focusing on the reflection and transmission properties, a simplified model is also derived, based on Foldy-Lax theory. The latter provides an equivalent index of refraction of the medium representing the porous structure, modeled as an inclusion in the waveguide. Results obtained by the present fully coupled and approximate models are compared against experimental measurements, collected in wave tank, showing good agreement. The present analysis permits an efficient calculation of the properties of the examined structure, reducing the computational cost and supporting design and optimization studies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect