Buscar
Mostrando ítems 31-40 de 232
Modulation instability in waveguides with an arbitrary frequency-dependent nonlinear coefficient
(Optical Society of America, 2020-05)
In this Letter, we present, for the first time, to the best of our knowledge, the modulation instability (MI) gain spectrum of waveguides with an arbitrary frequency-dependent nonlinear coefficient ensuring strict energy ...
Analytical study of coherence in seeded modulation instability
(American Physical Society, 2016-09)
We derive analytical expressions for the coherence in the onset of modulation instability, in excellent agreement with thorough numerical simulations. As usual, we start by a linear perturbation analysis, where broadband ...
Narrowband and ultra-wideband modulation instability in nonlinear metamaterial waveguides
(Optical Society of America, 2020-11)
Waveguides based on metamaterials may exhibit strongly frequency-dependent nonlinearities. In this work, we focus on the phenomenon of modulation instability in this type of waveguide, departing from a new modeling equation ...
Two-phase flow instabilities in a natural circulation rectangular loop
(ASME, 2000, 2014)
Parametric vibration of thin-walled composite beams with shear deformation
(Academic Press Ltd - Elsevier Science Ltd, 2007-09-11)
The dynamic stability of thin-walled composite beams, considering shear deformation, subjected to axial external force, has been investigated in this paper. The analysis is based on a small strain and moderate rotation ...
Experimental study of transient paths to the extinction in sonoluminescence
(Acoustical Soc Amer Amer Inst Physics, 2008-09)
An experimental study of the extinction threshold of single bubble sonoluminescence in an air-water system is presented. Different runs from 5% to 100% of air concentrations were performed at room pressure and temperature. ...
Free vibration and dynamic stability of rotating thin-walled composite beams
(Gauthier-Villars/Editions Elsevier, 2011-05)
The dynamic stability behavior of thin-walled rotating composite beams is studied by means of the finite element method. The analysis is based on Bolotin's work on parametric instability for an axial periodic load. The ...
Parametric decays, stabilization effects, and electrostatic instabilities due to finite-amplitude Alfvén waves in a fast solar wind-like plasma
(Blackwell Publishing Ltd, 2007)
The effects of a finite-amplitude Alfvén wave in a plasma system with a proton and an alpha-particle beam, are studied. The system is described by a fourteenth-order polynomial providing, thereby, many decay channels for ...
Nonlinear Electrostatic Ion-Acoustic-Like Instabilities in a System with Two Streaming Ion Components Moving in a Background Plasma
(Bentham open, 2008-11-26)
Finite amplitude Alfvén-cyclotron waves are believed to play an important role in coronal heating and
nonthermal properties of velocity distribution functions. These effects are thought to be due to parametrically ...
Hysteretic Faraday waves
(American Physical Society, 2016)
We report on the numerical and theoretical study of the subcritical bifurcation of parametrically amplified waves appearing at the interface between two immiscible incompressible fluids when the layer of the lower fluid ...