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Showing 1 to 15 of 15 for “"resonant interaction"”.
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On the dynamics of bouncing droplets in confined geometries
… the surface of a vibrating fluid bath through a resonant interaction with their own wave fields. These walking droplets, or 'walkers', exhibit several features previously thought to be peculiar to the microscopic, quantum realm. In particular, walkers in confined circular corrals exhibit a …
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Lattice thermal conductivity of copper alloys below 2 K
… was found to be in good agreement with theory. A resonant interaction appears to exist between the phonons and dislocations at a resonant frequency of ~ 10^11 Hz. Several models of resonating dislocations are examined with respect to this data. The scattering of thermal phonons by dislocations in …
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Nonlinear interactions among standing surface and internal gravity waves
… to internal gravity waves in a nonlinear, resonant interaction. The interacting waves form triads for which σ1s - σ2s ± σI = 0 and κ1s - κ2s ± κI = 0; σj and κj being the frequency and wavenumber of the jth wave. In particular, the experiment is designed to model a generating mechanism for …
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Development of the Magnetic Shielding and Rotational Stability Apparatus for use in the ARIADNE Project
… the goal of detecting the QCD Axion. The Axion Resonant InterAction DetectioN Experiment (ARIADNE) aims to accomplish this goal by using a resonantly enhanced technique to test for new spin-dependent forces, which are short range in nature. Thus the sample mass is modulated on resonance near a …
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Ponderomotive Forces in Pilot-Wave Hydrodynamics
… vibrating bath may self-propel (or ‘walk’) via a resonant interaction with their self-induced pilot wave. In pilot-wave hydrodynamics (PWH), the spontaneous emergence of coherent, wave-like statistics from chaotic trajectories has been reported in several settings. Owing to the similarity of PWH …
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Interaction of waves in a two-layer density stratified fluid
… part of this thesis, the mechanisms of nonlinear resonant interaction of surface-interfacial waves with a rippled bottom in a two-layer density stratified fluid in two dimensions is investigated via perturbation analyses and direct simulation. Three classes of Bragg resonances are found to exist …
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Application of Multi-Port Mixing for Passive Suppression of Thermo-Acoustic Instabilities in Premixed Combustors
… and heat release rate fluctuations due to a resonant interaction between the combustor acoustics and the flame. A primary feedback mechanism responsible for driving these systems is the propagation of Fuel/Air Ratio (FAR) fluctuations into the flame zone. These fluctuations are formed inside …
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Prediction of Tonal Acoustic Radiation Due to Feedback-Loop Resonant Interactions in Transitional Airfoils
… noise propagation from the flow acoustic resonant interactions of the transitional airfoil. The Potential-Theoretic Method (PTM) as an advancement to traditional Kirchhoff methods is presented. The PTM eliminated the need to calculate the normal derivatives of pressure and an arbitrary …
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SUPPRESSION OF ELECTRON THERMAL CONDUCTION IN THE HIGH β INTRACLUSTER MEDIUM OF GALAXY CLUSTERS
… heat flux, even when the heat flux is weak. The resonant interaction of electrons with these waves then plays a critical role in scattering electrons and suppressing the heat flux. In a 1D model where only whistler modes that propagate parallel to the magnetic field are captured, the only …
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Measurements of fast dynamics of hole spins in silicon
… hole spin system, displaying strong spin-orbit interactions (SOI), has enabled fast electrical control, however, requires a richer understanding of the physics of interacting spins in the presence of SOI both for control as well as readout of the spin states. In this thesis, I explore the spin …
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Dynamics of Energy Carriers in Solids During Interaction with Ultrafast Laser Pulses
… host lattice and form lattice vibration modes by resonant interaction and different species of guest atoms lead to such vibration modes with different frequencies, which can scatter phonons in a broad spectral span. Therefore, filling skutterudites with multiple species of atoms can reduce the …
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Understanding of weak turbulence of capillary waves
… of an ensemble of waves in weakly nonlinear interactions. In the wavenumber k domain, the WTT steady-state analytical solution yields a power-law inertial-range spectrum I - ka, with a constant energy flux P from large forcing scales to small dissipative scales. Over the years, this result …
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A mechanistic investigation of nonlinear interfacial instabilities leading to slug formation in multiphase flows
… to identify a mechanism composed of a triad of resonantly interacting interfacial waves which are influenced by the Kelvin-Helmholtz interfacial instability. The mechanism that is identified permits the rapid energy transfer from linearly unstable short waves to stable long waves through …
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Electron acceleration at localized wave structures in the solar corona
… I. Electron acceleration due to the solar jet interaction with the background coronal plasma (the jet--plasma interaction) A jet is formed when the newly reconnected and highly curved magnetic field lines are relaxed by shooting plasma away from the reconnection site. Such jets, as observed in …
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Using high pressure to study thermal transport and phonon scattering mechanisms
… MgO, or [Mg,Fe]O ferropericlase, are known to be resonantly scattered by interaction with a 3.3 THz electronic transition in the high-spin state of the Fe impurities. At sufficiently high pressures, the Fe atoms transition from a high-spin to a low-spin state, which eliminates the resonant …