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Spreading dynamics of drop impacts
- G. Lagubeau, M. Fontelos, C. Josserand, A. Maurel, V. Pagneux, P. Petitjeans
- PhysicsJournal of Fluid Mechanics
- 1 October 2012
Abstract We present an experimental study of drop impact on a solid surface in the spreading regime with no splashing. Using the space–time-resolved Fourier transform profilometry technique, we can…
Global measurement of water waves by Fourier transform profilometry
In this paper, we present an optical profilometric technique that allows for single-shot global measurement of free-surface deformations. This system consists of a high-resolution system composed of…
Lamb wave propagation in inhomogeneous elastic waveguides
The problem of Lamb wave propagation in an axially multi–layered waveguide is treated by a multi–modal approach. A general formalism is proposed that avoids the numerical divergence due to evanescent…
Influence of grazing flow and dissipation effects on the acoustic boundary conditions at a lined wall
The problem of sound propagation near a lined wall taking into account mean shear flow effects and viscous and thermal dissipation is investigated. The method of composite expansion is used to…
Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems
This work reports quasi-perfect sound absorption over almost two frequency octaves ranging from 300 to 1000 Hz for a panel composed of 9 resonators with a total thickness of 11 cm, i.e., 10 times smaller than the wavelength at 300 Hz.
Determination of Lamb mode eigenvalues.
An original method is presented to determine the complex Lamb wave spectrum by using a numerical spectral method applied to the elasticity equations, which allows the wave numbers to be determined at relatively high frequencies.
Lamb wave propagation in elastic waveguides with variable thickness
The problem of Lamb wave propagation in waveguides with varying height is treated by a multimodal approach. The technique is based on a rearrangement of the equations of elasticity that provides a…
Different regimes for water wave turbulence.
- P. Cobelli, A. Przadka, P. Petitjeans, G. Lagubeau, V. Pagneux, A. Maurel
- Physics, Environmental SciencePhysical Review Letters
- 18 November 2011
The wave spectrum is consistent with the Zakharov-Filonenko cascade predicted within wave turbulence theory, and depending on the bandwidth, the gravity spectral slope is found to be either forcing dependent, as classically observed in laboratory experiments, or forcing independent.
Modelling of sound propagation in a non-uniform lined duct using a Multi-Modal Propagation Method