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Review of Vortices in Wildland Fire
Published 2011-01-01“…In this paper, the current state of knowledge of the interaction of wildland fire and vortices is examined and reviewed. A basic introduction to vorticity is given, and the two common vortex forms in wildland fire are analyzed: fire whirls and horizontal roll vortices. …”
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Coherence vortices by binary pinholes
Published 2024-10-01Subjects: “…coherence vortices…”
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Characteristics and Development Mechanisms of Northeast Cold Vortices
Published 2021-01-01“…The northeast cold vortices (NECVs) in May-September during 1989–2018 are classified, based on the 6 h NCEP/NCAR reanalysis data (2.5° × 2.5°) and observational data from the Meteorological Information Comprehensive Analysis and Process System (MICAPS) provided by China Meteorological Administration. …”
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Encounters with Vortices in a Turbine Nozzle Passage
Published 2012-01-01“…Secondary flows and a wide range of vortex types were encountered, including horseshoe vortices, shock-induced passage vortices, and streamwise vortices on the suction surface. …”
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Optical vortices in dispersive nonlinear Kerr-type media
Published 2004-01-01“…Dispersion region and medium parameters necessary for experimental observation of these vortices are determined.…”
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Chirality reversal of vortices induced by surface acoustic waves
Published 2025-01-01“…While with the help of the third and fifth harmonics of the acoustic fundamental frequency, besides the changes in magnetic state, some vortices also change their chirality. The reason for this change is that the spin–vorticity coupling induced by the SAW leads to a change in the macroscopic magnetic moment through angular momentum transfer between the mechanical and electron spins. …”
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A metalens for detecting fractional-order optical vortices
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Investigation of Vorticity during Prevalent Winter Precipitation in Iran
Published 2018-01-01“…The precipitation threshold of 1 mm and a minimum prevalence of 50% were the criteria based on which the prevalent precipitation of Iran was identified. Then, vorticity of days corresponding to prevalent winter precipitation was calculated and, by performing cluster analysis, the representative days of vorticity were specified. …”
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Unravelling the nonlinear generation of designer vortices with dielectric metasurfaces
Published 2025-01-01“…Here, we demonstrate and analyze the generation of high-purity second harmonic (SH) optical vortices via dielectric meta-holograms. Through full-wave simulations and a proper fabrication protocol, we achieve efficient frequency doubling of an unstructured pump beam into SH vortices with topological charges from 1 to 10. …”
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Motion of two point vortices in a steady, linear, and elliptical flow
Published 2001-01-01“…For a pair of point vortices in an inviscid, incompressible fluid in the plane, the relative and absolute motion are determined when the vortices move under the influence of (1) each other, and (2) a steady, linear, and elliptical background flow.…”
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Experiments on Linear and Nonlinear Localization of Optical Vortices in Optically Induced Photonic Lattices
Published 2012-01-01“…We provide a brief overview on our recent experimental work on linear and nonlinear localization of singly charged vortices (SCVs) and doubly charged vortices (DCVs) in two-dimensional optically induced photonic lattices. …”
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Stable quantum droplets with high-order vorticity in zero-order Bessel lattice
Published 2025-01-01“…The circular groove structure inherent in the zeroth-order Bessel lattice potential facilitates the formation of distinct configurations, including stable zero-vorticity annular quantum droplets and annular quantum droplets featuring embedded vorticity. …”
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Emergence of Quantum Vortices in the Ionization of Helium by Proton Impact, and How to Measure Them
Published 2025-01-01“…This study investigates how the presence of quantum vortices affects the ionization cross-section of helium atoms by 75 keV proton impact, with special attention to the region near the electron capture to the continuum (ECC) cusp. …”
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Dispersion of optical vortices in twisted elliptical-core optical fibers with torsional stresses
Published 2024-02-01“…In this paper, the dispersion of optical vortices (OVs) with a topological charge l >= 1 in twisted elliptical fibers (TEF) with torsional stresses (TS) is studied. …”
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Direct Observations of North Pacific Subsurface Low Potential Vorticity Water Impinging on the Kuroshio
Published 2025-01-01“…Abstract In this study, for the first time, we found a Subsurface Low Potential Vorticity Water (SLPVW) to the east of Taiwan Island (122°–124°E, 21.67°–23°N) via an array comprising 12 current and pressure‐recording inverted echo sounders (CPIESs) from 25 June 2018 to 29 July 2019. …”
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Numerical Simulation of Tornado-like Vortices Induced by Small-Scale Cyclostrophic Wind Perturbations
Published 2025-01-01“…The results indicate that a robust cyclonic and an anticyclonic wind field can potentially generate a pair of cyclonic and anticyclonic tornadoes when the horizontal vortex tubes in an atmosphere with strong vertical wind shear tilt, forming a pair of positive and negative vorticities. These tornadoes are similar but have different rotation directions.…”
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Alignment-induced self-organization of autonomously steering microswimmers: Turbulence, clusters, vortices, and jets
Published 2025-02-01“…Pullers exhibit a strong tendency for clustering and display velocity and vorticity distributions with fat exponential tails; their dynamics is chaotic, with a temporal appearance of vortex rings and fluid jets. …”
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Propagation of optical vortices in an add-drop resonator based on a vertical array of ring resonators
Published 2024-04-01“…In this paper we study the transmission of higher-order modes, including optical vortices (OVs), through a bus fiber evanescently coupled with a vertical array of ring resonators (VAR), which form a vertically stacked multi-ring resonator. …”
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Stochastic 2D Incompressible Navier-Stokes Solver Using the Vorticity-Stream Function Formulation
Published 2013-01-01“…A two-dimensional stochastic solver for the incompressible Navier-Stokes equations is developed. The vorticity-stream function formulation is considered. …”
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