Particle displacement
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Particle Image Velocimetry for MATLAB: Accuracy and enhanced algorithms in PIVlab Open
PIVlab is a free toolbox and app for MATLAB®. It is used to perform Particle Image Velocimetry (PIV) with image data: A light sheet illuminates particles that are suspended in a fluid. A digital camera records a series of images of the ill…
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Zeptonewton force sensing with nanospheres in an optical lattice Open
Optically trapped nanospheres in high-vaccum experience little friction and\nhence are promising for ultra-sensitive force detection. Here we demonstrate\nmeasurement times exceeding $10^5$ seconds and zeptonewton force sensitivity\nwith l…
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Simulation of Single Particle Displacement Damage in Silicon–Part II: Generation and Long-Time Relaxation of Damage Structure Open
International audience
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AC electrokinetic biased deterministic lateral displacement for tunable particle separation Open
We describe a novel particle separation technique that combines deterministic lateral displacement (DLD) with orthogonal electrokinetic forces to separate particles below the critical diameter.
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Longitudinal shear wave imaging for elasticity mapping using optical coherence elastography Open
Shear wave measurements for the determination of tissue elastic properties have been used in clinical diagnosis and soft tissue assessment. A shear wave propagates as a transverse wave where vibration is perpendicular to the wave propagati…
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On Vibration Suppression and Energy Dissipation Using Tuned Mass Particle Damper Open
Particle damping has the promising potential for attenuating unwanted vibrations in harsh environments especially under high temperatures where conventional damping materials would not be functional. Nevertheless, a limitation of simple pa…
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Experimental study of particle trajectories below deep-water surface gravity wave groups Open
Owing to the interplay between the forward Stokes drift and the backward wave-induced Eulerian return flow, Lagrangian particles underneath surface gravity wave groups can follow different trajectories depending on their initial depth belo…
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Langevin Dynamics Driven by a Telegraphic Active Noise Open
Self-propelled or active particles are referred to as the entities which exhibit anomalous transport violating the fluctuation-dissipation theorem by means of taking up an athermal energy source from the environment. Currently, a variety o…
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Energy Dissipation Characteristics and Parameter Identification of Symmetrically Coated Damping Structure of Pipelines under Different Temperature Environment Open
In this paper, a symmetrically coated damping structure for entangled metallic wire materials (EMWM) of pipelines was designed to reduce the vibration of high temperature (300 °C) pipeline. A series of energy dissipation tests were carried…
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Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameters Open
The ultrasonic nonlinear parameter is measured from the amplitudes of the harmonic frequency components generated during the propagation of ultrasonic waves in a material. There are two definitions for this parameter: absolute and relative…
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A Parallel Scheme of Friction Dampers and Viscous Dampers for Girder-End Longitudinal Displacement Control of a Long-Span Suspension Bridge under Operational and Seismic Conditions Open
Benefitting from economic development and technological progress, long-span suspension bridges, with their superior span capacity and good economy, have been built in large numbers in recent decades. However, the excessive cumulative longi…
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Image-Aided Analysis of Ballast Particle Movement Along a High-Speed Railway Open
As a core infrastructure of high-speed railways, ballast layers constituted by graded crushed stones feature noteworthy particle movement compared with normal railways, which may cause excessive settlement and have detrimental effects on t…
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Experimental Investigation on the Nonlinear Coupled Flutter Motion of a Typical Flat Closed-Box Bridge Deck Open
The nonlinear post-flutter instabilities were experimentally investigated through two-degree-of-freedom sectional model tests on a typical flat closed-box bridge deck (width-to-depth ratio 9.14). Laser displacement sensors and piezoelectri…
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Mitigation of Traffic Induced Vibration Using Geocell Inclusions Open
This paper describes the potential use of geocell reinforcement in mitigating the traffic induced vibration. The vibration caused by the vehicular movement was simulated over the unreinforced and geocell reinforced sections using a mechani…
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Plane wave in non-local semiconducting rotating media with Hall effect and three-phase lag fractional order heat transfer Open
This paper deals with the propagation of the plane wave in a nonlocal magneto-thermoelastic semiconductor solid with rotation. The fractional-order three-phase lag theory of thermoelasticity with two temperatures has been applied. When a l…
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Random forest assisted vector displacement sensor based on a multicore fiber Open
We proposed a two-dimensional vector displacement sensor with the capability of distinguishing the direction and amplitude of the displacement simultaneously, with improved performance assisted by random forest, a powerful machine learning…
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Lagrangian transport for two-dimensional deep-water surface gravity wave groups Open
The Lagrangian trajectories of neutrally buoyant particles underneath surface gravity wave groups are dictated by two physical phenomena: the Stokes drift results in a net displacement of particles in the direction of propagation of the gr…
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Experimental measurement of particle crushing around model piles jacked in a calibration chamber Open
During installation of driven or jacked piles in sand, particle crushing occurs in a region below the base of these piles. Quantification of the degree and extent of particle crushing during driving or jacking in sand is necessary to impro…
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Mechanical analog of quantum bradyons and tachyons Open
We present a mechanical analog of a quantum wave-particle duality: a vibrating string threaded through a freely moving bead or "masslet." For small string amplitudes, the particle movement is governed by a set of nonlinear dynamical equati…
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Fluctuation Amplitude of a Trapped Rigid Sphere Immersed in a Near-Critical Binary Fluid Mixture within the Regime of the Gaussian Model Open
The position of a colloidal particle trapped in an external field thermally\nfluctuates at equilibrium. As is well known, the ambient fluid is not a simple\nheat bath and the particle mass appears to increase, which influences the mean\nsq…
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Fast Local Phase Velocity-Based Imaging: Shear Wave Particle Velocity and Displacement Motion Study Open
Fast and precise noninvasive evaluation of tissue mechanical properties is of high importance in ultrasound shear wave elastography. In this study, we present an updated, faster version of the local phase velocity-based imaging (LPVI) meth…
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Energy dissipation in horizontally driven particle dampers of low acceleration intensities Open
The energy dissipation in sinusoidally driven particle dampers is highly dependent on the motion mode of the particle bed. Especially, for applications of low acceleration intensity, i.e., acceleration amplitude below gravitational acceler…
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Wave Propagation Through a Micropolar Slab Sandwiched by Two Elastic Half-Spaces Open
The problem of wave propagation through a micropolar elastic slab sandwiched by two classical elastic half-spaces is studied in this paper. Different from the classical elastic solids, the particle in micropolar solids can bear not only th…
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Development of a Helical Lamb Wave Electromagnetic Acoustic Transducer for Pipeline Inspection Open
The electromagnetic ultrasonic testing presents great potential in structural health monitoring due to its non-contact advantage. The electromagnetic acoustic transducers generating torsional and longitudinal guided wave have been extensiv…
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Single Magnetic Particle Motion in Magnetomotive Ultrasound: An Analytical Model and Experimental Validation Open
Magnetomotive Ultrasound (MMUS) is an emerging imaging modality, in which magnetic nanoparticles (MNPs) are used as contrast agents. MNPs are driven by a time-varying magnetic force, and the resulting movement of the surrounding tissue is …
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Estimation of shear rate change in vertically oscillating non-Newtonian fluids: Predictions on particle settling Open
This study investigates the effect of oscillatory motion on velocity and shear rate change within different non-Newtonian, slightly viscoelastic fluids oscillated in a vertical U-shaped circular pipe. An estimation to quantify the influenc…
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Permeability Evolution of Fractured Rock Subjected to Cyclic Axial Load Conditions Open
Permeability experiments on saw-cut fractured rock subjected to cyclic axial load conditions were conducted on the MTS815 rock mechanics testing system. The influence of the frequency and amplitude of cyclic axial forces on axial displacem…
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Coordinated Control of Wave Energy Converters Subject to Motion Constraints Open
In this paper, a generic coordinated control method for wave energy converters is proposed, and the constraints on motion amplitudes and the hydrodynamic interaction between converters are considered. The objective of the control problem i…
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Sound velocity effects on the phase transition gravitational wave spectrum in the sound shell model Open
A cosmological first-order phase transition gravitational wave could provide\na novel approach to studying the early Universe. In most cases, the acoustic\ngravitational wave from the sound wave mechanism is dominant. Considering\ndifferen…
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Internal wave focusing by a horizontally oscillating torus Open
This paper presents an experimental study on internal waves emitted by a horizontally oscillating torus in a linearly stratified fluid. Two internal wave cones are generated with the kinetic energy focused at the apices of the cones above …