Results 21 to 30 of about 865,198 (295)
Coherent perfect absorption in photonic structures [PDF]
, 2015 The ability to drive a system with an external input is a fundamental aspect of light-matter interaction. The coherent perfect absorption (CPA) phenomenon extends to the general multibeam interference phenomenology the well known critical coupling ...
Baldacci, Lorenzo +2 more
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Revista Brasileira de Meteorologia, 2011 São apresentados os resultados de uma investigação sobre o processo de convecção de Rayleigh - Bénard partindo do cálculo dos números adimensionais de Rayleigh (Ra) e de Richardson (Ri), com o objetivo de encontrar critérios que sejam representativos do ...
Nivian Quintana Rodríguez +2 more
doaj +1 more source
On-off intermittency and amplitude-phase synchronization in Keplerian shear flows [PDF]
, 2014 We study the development of coherent structures in local simulations of the magnetorotational instability in accretion discs in regimes of on-off intermittency. In a previous paper [Chian et al., Phys. Rev. Lett.
Chian, Abraham C. -L. +2 more
core +1 more source
Energy and Entropy in Turbulence Decompositions
Entropy, 2019 The role of energy and entropy in the decomposition of turbulent velocity flow-fields is shown in this paper. Decomposition methods based on the energy concept are taken into account—proper orthogonal decomposition (POD) and its extension bi ...
Václav Uruba
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On the Wake Dynamics of an Oscillating Cylinder via Proper Orthogonal Decomposition
Fluids, 2022 The coherent structures and wake dynamics of a two-degree-of-freedom vibrating cylinder with a low mass ratio at Re=5300 are investigated by means of proper orthogonal decomposition (POD) of a numerical database generated using large-eddy simulations ...
Benet Eiximeno +4 more
doaj +1 more source
Lagrangian coherent structures in n-dimensional systems [PDF]
, 2007 Numerical simulations and experimental observations reveal that unsteady fluid systems can be divided into regions of qualitatively different dynamics.
Lekien, Francois +2 more
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Structured interference optical coherence tomography [PDF]
Optics Letters, 2012 We developed a structured interference optical coherence tomography (SIOCT) to enhance the lateral resolution beyond the diffraction limit. A sinusoidal pattern is created on the interferometric beam with the reference intensity temporally modulated.
Ji, Yi +3 more
openaire +2 more sources
On Rayleigh-Taylor and Richtmyer-Meshkov Dynamics With Inverse-Quadratic Power-Law Acceleration
Frontiers in Applied Mathematics and Statistics, 2022 Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) instabilities occur in many situations in Nature and technology from astrophysical to atomic scales, including stellar evolution, oceanic flows, plasma fusion, and scramjets.
D. L. Hill, S. I. Abarzhi
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Coherent structure colouring: identification of coherent structures from sparse data using graph theory [PDF]
Journal of Fluid Mechanics, 2016 We present a frame-invariant method for detecting coherent structures from Lagrangian flow trajectories that can be sparse in number, as is the case in many fluid mechanics applications of practical interest. The method, based on principles used in graph colouring and spectral graph drawing algorithms, examines a measure of the kinematic dissimilarity ...
Schlueter-Kuck, Kristy L. +1 more
openaire +3 more sources
Control Parameters for Boundary-Layer Instabilities in Unsteady Shock Interactions
Entropy, 2012 This article presents the computation of a set of control parameters for the deterministic prediction of laminar boundary-layer instabilities induced by an imposed unsteady shock interaction.
LaVar King Isaacson
doaj +1 more source