arXiv subjects

Samantha Kucher

Publications and source records attributed to Samantha Kucher.

2 recordsLinked to original sources

arXiv2025

Discovery of propagating trains of oscillons over Faraday waves in a 1D experiment

We report the discovery of highly localized structures traveling over a one-dimensional pattern of Faraday waves in a vertically-vibrated fluid layer confined in a thin annular cell. These propagating structures emerge spontaneously beyond a threshold and coexist with the underlying pattern. They move at constant speed, in trains of sharp peaks that co- and counter-propagate along the cell, with velocities largely exceeding the Faraday waves drift. Our results raise the question whether propagating localized structures are also observable in other parametrically driven systems in physics.

physics.flu-dyn↗

arXiv2023

Backscattering reduction in a sharply bent water wave channel

We study theoretically and experimentally how to reduce the backscattering of water waves in a channel with multiple turns. We show that it is not only possible to cancel backscattering but also to achieve a remarkable transmission in such geometries. In order to avoid the reflection that naturally arises at each turn of the waveguide, an anisotropic metamaterial made of closely-spaced thin vertical plates is used. The efficiency of the metamaterial arrangement depends only slightly on the frequency of the incident wave, as long as its wavelength is much larger than the periodicity of the array. This phenomenon is not restricted only to water wave channels but also applies to any type of waves with Neumann boundary conditions.

physics.class-ph↗