Publications related to Picosecond ultrasonics

Characterization of Thruster-Induced Turbulence for Fine Sediment Suspension

Giovanni De Cesare, Azin Amini, Montana Marshall, Andre Luis Stakowian

Reservoir sedimentation is a key challenge for storage sustainability because it causes volume loss, affecting hydropower production capacity, dam safety, and flood management. A preliminary EPFL study proposed and studied an innovative device (called SEDM ...

2023

Flow monitoring of particle-laden flows combining ultrasonic doppler and echo intensity profiling techniques

Giovanni De Cesare, Shun Nomura, Jumpei Hitomi

The methodology to reveal inner structures of turbidity currents are required. Their behaviors have important roles to affect the sedimentation or transportation of fine particles. We have proposed a novel monitoring methodology for flows containing fine p ...

2018

LABORATORY EXPERIMENTS OF PULSED SUBAQEOUS SEDIMENT DENSITY FLOWS: INTERNAL STRATIFICATION AND LAYERING

Mário Jorge Rodrigues Pereira Da Franca, Carmelo Juez Jiménez, Mariangela Sfouni-Grigoriadou

This paper reports on an experimental study which focuses on reproducing small scale sediment density flows in a laboratory flume. The observations are aimed at improving the parametrization of the relations that govern the transition between different pha ...

2017

Velocity profiles of turbidity currents flowing over a flat bed

Anton Schleiss, Giovanni De Cesare, Sabine Chamoun

Turbidity currents are the main source of suspended sediment transport in reservoirs and thus one of the main causes of sedimentation. One of the techniques used to avoid reservoir sedimentation is through venting of turbidity currents. In the framework of ...

2016

Velocity profile measurements in bore waves

Anton Schleiss, Giovanni De Cesare, Michael Pfister, Davide Wüthrich

Hydrodynamic waves are an unsteady flow motion generated by rapid water level rise. In nature, such events can be found in dam-break waves, impulse waves and tsunamis. These phenomena are rare, but highly destructive. The present study is based on an exper ...

2016

A mathematical and numerical framework for ultrasonically-induced Lorentz force electrical impedance tomography

Pierre Robert Maurice Millien

We provide a mathematical analysis and a numerical framework for Lorentz force electrical conductivity imaging. Ultrasonic vibration of a tissue in the presence of a static magnetic field induces an electrical current by the Lorentz force. This current can ...

Elsevier2015

Picosecond acoustics method for measuring the thermodynamical properties of solids and liquids at high pressure and high temperature

Livia Eleonora Bove Kado

Based on the original combination of picosecond acoustics and diamond anvils cell, recent improvements to accurately measure hypersonic sound velocities of liquids and solids under extreme conditions are described. To illustrate the capability of this tech ...

Elsevier Science Bv2014

Equation of state of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements

Livia Eleonora Bove Kado

Ultrafast acoustics measurements on liquid mercury have been performed at high pressure and temperature in a diamond anvil cell using picosecond acoustic interferometry. We extract the density of mercury from adiabatic sound velocities using a numerical it ...

American Institute of Physics2014

Metamaterial buffer for broadband non-resonant impedance matching of obliquely incident acoustic waves

Romain Christophe Rémy Fleury

Broadband impedance matching and zero reflection of acoustic waves at a planar interface between two natural materials is a rare phenomenon, unlike its optical counterpart, frequently observed for polarized light incident at the Brewster angle. In this art ...

Acoustical Society of America2014

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Picosecond ultrasonics

Inverse Problems in Pulse-Echo Ultrasound: Exploiting Coherence for Image Enhancement and Quantitative Imaging

Characterization of Thruster-Induced Turbulence for Fine Sediment Suspension

Flow monitoring of particle-laden flows combining ultrasonic doppler and echo intensity profiling techniques

LABORATORY EXPERIMENTS OF PULSED SUBAQEOUS SEDIMENT DENSITY FLOWS: INTERNAL STRATIFICATION AND LAYERING

Velocity profiles of turbidity currents flowing over a flat bed

Velocity profile measurements in bore waves

A mathematical and numerical framework for ultrasonically-induced Lorentz force electrical impedance tomography

Picosecond acoustics method for measuring the thermodynamical properties of solids and liquids at high pressure and high temperature

Equation of state of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements

Metamaterial buffer for broadband non-resonant impedance matching of obliquely incident acoustic waves

Graph Chatbot

Chat with Graph Search

Picosecond acoustics method for measuring the thermodynamical properties of solids and liquids at high pressure and high temperature

Metamaterial buffer for broadband non-resonant impedance matching of obliquely incident acoustic waves

LABORATORY EXPERIMENTS OF PULSED SUBAQEOUS SEDIMENT DENSITY FLOWS: INTERNAL STRATIFICATION AND LAYERING

Characterization of Thruster-Induced Turbulence for Fine Sediment Suspension

Flow monitoring of particle-laden flows combining ultrasonic doppler and echo intensity profiling techniques

Equation of state of liquid mercury to 520 K and 7 GPa from acoustic velocity measurements

Velocity profiles of turbidity currents flowing over a flat bed

Velocity profile measurements in bore waves

A mathematical and numerical framework for ultrasonically-induced Lorentz force electrical impedance tomography

Inverse Problems in Pulse-Echo Ultrasound: Exploiting Coherence for Image Enhancement and Quantitative Imaging