C. Dwyer N, C. B. Boothroyd, S. L. Y. Chang et al. · 2014
Partial coherence a b s t r a c t It is demonstrated how an electron-optical arrangement consisting of two electron biprisms can be used to generate three-wave vortex lattices with effective lattice spacings between 0.1 and 1 nm. The presence of vortices in these lattices was verified by using a third biprism to perform direct phase measurements via off-axis electron holography. The use of three-wave lattices for nanoscale electro-magnetic field measurements via vortex interferometry is discussed, including the accuracy of vortex position measurements and the interpretation of three-wave vortex lattices in the presence of partial spatial coherence. & 2014 Elsevier B.V. All rights reserved. 1.
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Serebryakov Rudolf, Vladimir Vasilyevich Biryuk, В. Т. Волов · Advances in environmental engineering and green technologies book series · 2018
One of the non-traditional types of renewable energy is vortex energy, which arises when swirling flows of continuous media (e.g., liquid and gas) are formed and which can be converted into thermal energy, work, and also used to raise the temperature in some systems or to create a pressure gradient. Vortex structures are systematically found in many physical processes. In recent years, new aspects of studying the vortex have been considered. These aspects are associated with physical phenomena, which indicate the occurrence of nonlinear effects in liquid media. Vortex flows of continuous media are one of the most important and complex phenomena in the mechanics of liquids and gases. They are characterized by specific manifestations that are fundamentally different from the axial properties of the motion of the medium, such as the appearance of secondary flows.
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James R. Riordan · Physics Today · 2001
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Philippe Petitjeans · Physics of Fluids · 1998
First Page
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Gustafson, Karl E. · 1991
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Melvyn S. Berger · 1989
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Melvyn S. Berger · 1988
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Karl E. Gustafson, James A. Sethian · Society for Industrial and Applied Mathematics eBooks · 1991
Vortex phenomena in fluid flows and the experimental, theoretical, and numerical methods used to characterize them are discussed in reviews by leading experts. Chapters are devoted to an overview of vortex methods, the convergence of vortex methods, graphic displays from numerical simulations, physical vortex visualizations, the four principles of vortex motion, the visualization and computation of hovering-mode vortex dynamics, turbulence and vortices in superfluid He, and statistical-mechanics approaches to vortices and turbulence. Extensive photographs and sample computer graphics are provided.
Cited by 75
Tomboulis, E.T. (California State Univ., Los Angeles, CA (United States). Dept. of Physics), Kovacs, T.G. (Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany). John von Neumann-Inst. fuer Computing NIC), Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany) · OpenGrey (Institut de l'Information Scientifique et Technique) · 2001
We investigate the manner in which a linear potential arises from fluctuations due to vortices linked with the Wilson loop. In particular, the customary naive picture is critically reexamined. (orig.)
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Hitoshi Ishikawa, Seiichiro Izawa, Osamu MOCHIZUKI et al. · TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B · 2002
Numerical simulations of the interaction between the vortex ring and the vortex tube was performed, with the aim of control of tumbulent mixing layer. The vortex tube is the simple model of the rolling-up vortices in the mixing layer. The simulation was made by the three-dimensional vortex blob method. The ratio of circulation of vortex tube to vortex ring ΓR/ΓF was varied in the range of 0.5-2.0. If ΓR/ΓF=0.5 the vortex was stretched and involved into the vortex tube. If ΓR/ΓF=1.0 the cut and reconnection occurred between a part of the vortex ring and a part of the vortex tube. But if ΓR/ΓF exceeds about 1.5 the vortex ring was found to pass through the vortex tube. The initial position of the vortex ring has significant effects on the interaction. A portion in the vortex ring whose circulation is the same sign as the vortex tube, combined with the vortex tube to generate the large vortex. On the other hand, another portion in the vortex ring of the opposite sign generate a new vortex pair.
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Mizuki Sakakibara, Tomoyasu NISHIWAKI, Masahisa SHINODA · The Proceedings of Mechanical Engineering Congress Japan · 2025
In this study, we dealt with a rapid and explosive vortex stretching in vortex reconnection of two vortex rings, and aimed to estimate the speed of vortex stretching and to provide considerations to it from the perspectives of thermodynamics, statistical mechanics and control engineering. As a method, both of Biot-Savart simulation and Navier-Stokes simulation were used. Firstly, from the temporal changes in the stretching rate, the logarithm of stretching rate and the exponent of exponential increase of stretching rate, the speed of vortex stretching was estimated quantitatively. Then, in the temporal change in the logarithm of stretching rate, a transition point was observed near the reconnection occurrence time, and at the transition point, the speed of vortex stretching changed significantly. Secondly, several considerations were given to such results from the perspectives of the entropy in thermodynamics and statistical mechanics and of the Lyapunov exponent in control engineering.
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U.S. Army Corps of Engineers Hydrologic Engineering Center, Brauer, Thomas · Zenodo (CERN European Organization for Nuclear Research) · 2025
Vortex is a collection of data processing utilities targeted for Hydrologic Engineering Center applications, e.g. HEC-HMS, HEC-RAS. The Vortex API uses NetCDF Java and GDAL libraries to perform operations on spatial data.
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U.S. Army Corps of Engineers Hydrologic Engineering Center, Brauer, Thomas · Zenodo (CERN European Organization for Nuclear Research) · 2025
Vortex is a collection of data processing utilities targeted for Hydrologic Engineering Center applications, e.g. HEC-HMS, HEC-RAS. The Vortex API uses NetCDF Java and GDAL libraries to perform operations on spatial data.
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John A. Schuster · Cambridge University Press eBooks · 2015
The theory of vortical celestial mechanics, as presented in the Principles of Philosophy and The World, is the “engine room” of Descartes’ system of natural philosophy. Descartes starts his vortex theory with an “indefinitely” large chunk of divinely created matter or extension in which there are no void spaces whatsoever. When God injects motion into this extension, it is shattered into microparticles, and myriads of “circular” displacements ensue, forming gigantic whirlpools or vortices. This process eventually produces three species of corpuscle, or elements, along with the birth of stars and planets. The third element forms all solid and liquid bodies on all planets throughout the cosmos, including the earth. Interspersed in the pores of such planetary bodies are the spherical particles of the second element. The second element also makes up the bulk of every vortex, while the spaces between these spherical particles are filled by the first element, which also constitutes the stars, including our sun.
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U.S. Army Corps of Engineers Hydrologic Engineering Center, Brauer, Thomas · Zenodo (CERN European Organization for Nuclear Research) · 2024
Vortex is a collection of data processing utilities targeted for Hydrologic Engineering Center applications, e.g. HEC-HMS, HEC-RAS. The Vortex API uses NetCDF Java and GDAL libraries to perform operations on spatial data.
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U.S. Army Corps of Engineers Hydrologic Engineering Center, Brauer, Thomas · Zenodo (CERN European Organization for Nuclear Research) · 2025
Vortex is a collection of data processing utilities targeted for Hydrologic Engineering Center applications, e.g. HEC-HMS, HEC-RAS. The Vortex API uses NetCDF Java and GDAL libraries to perform operations on spatial data.
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Cross, Julie, Perrin, Isabelle · HAL (Le Centre pour la Communication Scientifique Directe) · 2013
International audience
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Appleton, Robert · OCAD University Open Research Repository (OCAD University) · 2010
Vortex. Visual Aural Textual. One language is an interdisciplinary art form — \nimprovising the visual, aural and textual mediated by technology and revealing that one \nlanguage exists at their intersection. \nThese three separate art forms have largely been held by our culture as distinct subjects. \nThey have been connected in a documentary way by our most popular communications \nmedia, film and television — yet they have less frequently been used as pure \ninterdisciplinary form with which to explore their own synergy. Perhaps the oldest form to \nexpress the singularity of sound text and image is the ancient OM chant. \nAs a performance medium and compositional theory, Vortex is a catalyst for a deeper \nlevel of communication than we experience with any one or two media. It is documented \nby means of performance, gallery presentation, research and publication.
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Igor P. Ivanov · 2013
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Gian Agbisit · Kritike An Online Journal of Philosophy · 2022
The cover photo displays the staircase of the Maison de Jules Verne, known as the "House with the Tower," in Amiens, France. A globe-designed dome is atop the tower, and the perspective this photo offers us is a gaze into the vortex behind any aspiration, best represented by globalism's championing of all desires, or the journey into the depths of our desires, such in the case of Professor Otto Lidenbrock's wish to journey to the earth's center. This helix of an adventure to arrive where we currently are or aspire to be is often forgotten today due to how instantaneous everything has become; yet from this vortex, the movement either up or down, comes the spiral of emotions that poetry, fiction, literature, philosophy-the humanities as a whole-aptly capture, exemplified by the writings of Verne. What remains vital for today is a consciousness of this whorl and precisely its depth, for life is not a straight line, and such makes the adventure of a lifetime exceptional. As Verne writes in his Journey to the Center of the Earth that the Professor was carefully examining the fissures in the rocks for the depth of every cavity is important, we too ought to desire to probe every vortex behind each of our aspirations.
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