Publication
Growth and nonlinear response of driven water bells
Publications associées (32)
Optimization of elastic wave propagation in a reconfigurable medium by genetic algorithms with adaptive mutation probability
Romain Christophe Rémy Fleury, Janez Rus
We introduce a reconfigurable medium for the manipulation of elastic propagation properties of Lamb waves. It is based on a shape memory polymer (SMP) with temperature-dependent Young's modulus. Waves are excited by a laser pulse and detected by a laser vi ...
IOP Publishing Ltd2023Self-sustained dynamics and forced resonant oscillations in flows: cross-junction jets and sloshing liquids
In engineering, oscillatory instabilities and resonances are often considered undesirable flow features and measures are taken to avoid them. This may include avoiding certain parametric regions or implementing control and mitigation strategies. However, t ...
EPFL2023Stress wave propagation through a 180° bend junction in a square cross-sectional bar
Jean-François Molinari, Antonio Joaquin Garcia Suarez, Ghatu Subhash
Longitudinal elastic stress wave propagation through a 180° bend junction connecting two square bars is analyzed using analytical and numerical approaches and validated against experiments. The aim is to identify conditions under which the one-dimensional ...
2022Topology and broken Hermiticity
Topology and symmetry have emerged as compelling guiding principles to predict and harness the propagation of waves in natural and artificial materials. Be it for quantum particles (such as electrons) or classical waves (such as light, sound or mechanical ...
2020Experimental study on tsunamis generated by landslides
Christophe Ancey, Zhenzhu Meng, Ivan Maeder
Tsunami generated by landslides is one of the major threats to populations in coastal areas. A recent example is the 2017 Nuugaatsiaq tsunami. The village in Greenland was partially swept by a tsunami created by a landslide that fell into the Karrat Fjord. ...
2020Experimental comparison of tsunami generated by viscoplastic and granular slides.
Tsunami induced by subaerial landslides threatens coastal areas. The waves have mostly been studied in the laboratory using sliding blocks or granular media hitting a water body, but none of these materials makes it possible to understand how sliding mass’ ...
2018Dynamic pressure probe response tests for robust measurements in periodic flows close to probe resonating frequency
Jürg Alexander Schiffmann, Fatma Ceyhun Sahin
A single-hole probe was designed to measure steady and periodic flows with high fluctuation amplitudes and with minimal flow intrusion. Because of its high aspect ratio, estimations showed that the probe resonates at a frequency two orders of magnitude low ...
Institute of Physics2018Resonance in swirling wakes and sloshing waves
Similarly to mechanical structures, stable flows can exhibit resonance when perturbed by an impulsive or harmonic forcing. Swirling wakes and sloshing waves belong to this kind of flows and manifest large energy response when excited close to their natural ...
EPFL2016A self-consistent formulation for the sensitivity analysis of finite-amplitude vortex shedding in the cylinder wake
François Gallaire, Edouard Boujo, Philippe Meliga
We use the adjoint method to compute sensitivity maps for the limit-cycle frequency and amplitude of the Benard von Karmzin vortex street in the wake of a circular cylinder. rfhe sensitivity, analysis is performed in the frame of the semi-linear self consi ...
Cambridge University Press2016Wave propagation in the vicinities of rock fractures under obliquely incident wave
Lyesse Laloui, Jian Zhao, Yang Zou, Jing Li
Though obliquely incident plane wave across rock fractures has been extensively investigated by theoretical analysis, the quantitative identification of each wave emerged from fractures has not been achieved either in numerical simulation or laboratory exp ...
Springer Verlag2016