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Artykuły w czasopismach na temat „Vortex interactions”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Scott, R. K., and D. G. Dritschel. "Vortex–Vortex Interactions in the Winter Stratosphere." Journal of the Atmospheric Sciences 63, no. 2 (2006): 726–40. http://dx.doi.org/10.1175/jas3632.1.

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Abstract This paper examines the interaction of oppositely signed vortices in the compressible (non-Boussinesq) quasigeostrophic system, with a view to understanding vortex interactions in the polar winter stratosphere. A series of simplifying approximations leads to a two-vortex system whose dynamical properties are determined principally by two parameters: the ratio of the circulation of the vortices and the vertical separation of their centroids. For each point in this two-dimensional parameter space a family of equilibrium solutions exists, further parameterized by the horizontal separatio

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2

ISHIKAWA, Hitoshi, Seiichiro IZAWA, Osamu MOCHIZUKI, and Masaru KIYA. "Vortex Ring-Vortex Tube Interactions." Transactions of the Japan Society of Mechanical Engineers Series B 68, no. 674 (2002): 2688–94. http://dx.doi.org/10.1299/kikaib.68.2688.

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3

Peng, Di, and James W. Gregory. "Vortex dynamics during blade-vortex interactions." Physics of Fluids 27, no. 5 (2015): 053104. http://dx.doi.org/10.1063/1.4921449.

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4

Rockwell, Donald. "VORTEX-BODY INTERACTIONS." Annual Review of Fluid Mechanics 30, no. 1 (1998): 199–229. http://dx.doi.org/10.1146/annurev.fluid.30.1.199.

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5

FRITTS, DAVID C., STEVE ARENDT, and ØYVIND ANDREASSEN. "Vorticity dynamics in a breaking internal gravity wave. Part 2. Vortex interactions and transition to turbulence." Journal of Fluid Mechanics 367 (July 25, 1998): 47–65. http://dx.doi.org/10.1017/s0022112098001633.

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A companion paper (Part 1) employed a three-dimensional numerical simulation to examine the vorticity dynamics of the initial instabilities of a breaking internal gravity wave in a stratified, sheared, compressible fluid. The present paper describes the vorticity dynamics that drive this flow to smaller-scale, increasingly isotropic motions at later times. Following the initial formation of discrete and intertwined vortex loops, the most important interactions are the self-interactions of single vortex tubes and the mutual interactions of multiple vortex tubes in close proximity. The initial f

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6

Verzicco, R., and P. Orlandi. "Wall/Vortex-Ring Interactions." Applied Mechanics Reviews 49, no. 10 (1996): 447–61. http://dx.doi.org/10.1115/1.3101985.

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This review article presents a state-of-the-art review of the ring and wall interactions in the case of normal and oblique collisions. The different approaches used to study this flow and the results obtained are described and discussed. These techniques span from flow visualizations to LDV measurements, direct numerical simulations, particle-in-cell vortex methods and viscous and inviscid interactions. The relevance of these basic flows to the comprehension of wall-turbulence is also described. Finally, further developments, such as interaction with a grooved surface and with a deformable wal

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7

BAMBREY, ROSS R., JEAN N. REINAUD, and DAVID G. DRITSCHEL. "Strong interactions between two corotating quasi-geostrophic vortices." Journal of Fluid Mechanics 592 (November 14, 2007): 117–33. http://dx.doi.org/10.1017/s0022112007008373.

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In this paper we investigate the interaction between two corotating quasi-geostrophic vortices. The initially ellipsoidal vortices are separated horizontally by a distance corresponding to the margin of stability, as determined from an ellipsoidal analysis. The subsequent interaction depends on four parameters: the vortex volume ratio, the vertical centroid separation, and the height-to-width aspect ratios of each vortex. The most commonly observed strong interaction is partial merger, where only part of the weaker vortex is incorporated into the stronger one or cast into filamentary debris. D

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8

TANG, S. K., and N. W. M. KO. "Sound sources in the interactions of two inviscid two-dimensional vortex pairs." Journal of Fluid Mechanics 419 (September 25, 2000): 177–201. http://dx.doi.org/10.1017/s0022112000001294.

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The sources of sound during the interactions of two identical two-dimensional inviscid vortex pairs are investigated numerically by using the vortex sound theory and the method of contour dynamics. The sound sources are identified and then separated into two independent components, which represent the contributions from the vortex centroid dynamics and the microscopic vortex core dynamics. Results show that the sound generation mechanism of the latter is independent of the type of vortex pair interaction, while that of the former depends on the jerks, accelerations and vortex forces on the vor

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9

Kivshar, Yuri S., Alexander Nepomnyashchy, Vladimir Tikhonenko, Jason Christou, and Barry Luther-Davies. "Vortex-stripe soliton interactions." Optics Letters 25, no. 2 (2000): 123. http://dx.doi.org/10.1364/ol.25.000123.

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10

Doligalski, T. L., C. R. Smith, and J. D. A. Walker. "Vortex Interactions with Walls." Annual Review of Fluid Mechanics 26, no. 1 (1994): 573–616. http://dx.doi.org/10.1146/annurev.fl.26.010194.003041.

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11

Roenby, Johan, and Hassan Aref. "Chaos in body–vortex interactions." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466, no. 2119 (2010): 1871–91. http://dx.doi.org/10.1098/rspa.2009.0619.

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The model of body–vortex interactions, where the fluid flow is planar, ideal and unbounded, and the vortex is a point vortex, is studied. The body may have a constant circulation around it. The governing equations for the general case of a freely moving body of arbitrary shape and mass density and an arbitrary number of point vortices are presented. The case of a body and a single vortex is then investigated numerically in detail. In this paper, the body is a homogeneous, elliptical cylinder. For large body–vortex separations, the system behaves much like a vortex pair regardless of body shape

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12

KUO, ALLEN C., and LORENZO M. POLVANI. "Wave–vortex interaction in rotating shallow water. Part 1. One space dimension." Journal of Fluid Mechanics 394 (September 10, 1999): 1–27. http://dx.doi.org/10.1017/s0022112099005534.

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Using a physical space (i.e. non-modal) approach, we investigate interactions between fast inertio-gravity (IG) waves and slow balanced flows in a shallow rotating fluid. Specifically, we consider a train of IG waves impinging on a steady, exactly balanced vortex. For simplicity, the one-dimensional problem is studied first; the limitations of one-dimensionality are offset by the ability to define balance in an exact way. An asymptotic analysis of the problem in the small-amplitude limit is performed to demonstrate the existence of interactions. It is shown that these interactions are not conf

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13

Nair, Aditya G., and Kunihiko Taira. "Network-theoretic approach to sparsified discrete vortex dynamics." Journal of Fluid Mechanics 768 (March 10, 2015): 549–71. http://dx.doi.org/10.1017/jfm.2015.97.

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We examine discrete vortex dynamics in two-dimensional flow through a network-theoretic approach. The interaction of the vortices is represented with a graph, which allows the use of network-theoretic approaches to identify key vortex-to-vortex interactions. We employ sparsification techniques on these graph representations based on spectral theory to construct sparsified models and evaluate the dynamics of vortices in the sparsified set-up. Identification of vortex structures based on graph sparsification and sparse vortex dynamics is illustrated through an example of point-vortex clusters in

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14

Cenedese, Claudia, Robert E. Todd, Glen G. Gawarkiewicz, W. Brechner Owens, and Andrey Y. Shcherbina. "Offshore Transport of Shelf Waters through Interaction of Vortices with a Shelfbreak Current." Journal of Physical Oceanography 43, no. 5 (2013): 905–19. http://dx.doi.org/10.1175/jpo-d-12-0150.1.

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Abstract Interactions between vortices and a shelfbreak current are investigated, with particular attention to the exchange of waters between the continental shelf and slope. The nonlinear, three-dimensional interaction between an anticyclonic vortex and the shelfbreak current is studied in the laboratory while varying the ratio ε of the maximum azimuthal velocity in the vortex to the maximum alongshelf velocity in the shelfbreak current. Strong interactions between the shelfbreak current and the vortex are observed when ε &gt; 1; weak interactions are found when ε &lt; 1. When the ant

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15

Dritschel, David G. "A general theory for two-dimensional vortex interactions." Journal of Fluid Mechanics 293 (June 25, 1995): 269–303. http://dx.doi.org/10.1017/s0022112095001716.

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A general theory for two-dimensional vortex interactions is developed from the observation that, under slowly changing external influences, an individual vortex evolves through a series of equilibrium states until such a state proves unstable. Once an unstable equilibrium state is reached, a relatively fast unsteady evolution ensues, typically involving another nearby vortex. During this fast unsteady evolution, a fraction of the original coherent circulation is lost to filamentary debris, and, remarkably, the flow reorganizes into a set of quasi-steady stable vortices.The simplifying feature

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16

Kuo, Hung-Chi, Wayne H. Schubert, Chia-Ling Tsai, and Yu-Fen Kuo. "Vortex Interactions and Barotropic Aspects of Concentric Eyewall Formation." Monthly Weather Review 136, no. 12 (2008): 5183–98. http://dx.doi.org/10.1175/2008mwr2378.1.

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Abstract Concentric eyewall formation can be idealized as the interaction of a tropical cyclone core with nearby weaker vorticity of various spatial scales. This paper considers barotropic aspects of concentric eyewall formation from modified Rankine vortices. In this framework, the following parameters are found to be important in concentric eyewall formation: vorticity strength ratio, separation distance, companion vortex size, and core vortex skirt parameter. A vorticity skirt on the core vortex affects the filamentation dynamics in two important ways. First, the vorticity skirt lengthens t

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17

Gemmell, Brad J., Kevin T. Du Clos, Sean P. Colin, Kelly R. Sutherland, and John H. Costello. "The most efficient metazoan swimmer creates a ‘virtual wall’ to enhance performance." Proceedings of the Royal Society B: Biological Sciences 288, no. 1942 (2021): 20202494. http://dx.doi.org/10.1098/rspb.2020.2494.

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It has been well documented that animals (and machines) swimming or flying near a solid boundary get a boost in performance. This ground effect is often modelled as an interaction between a mirrored pair of vortices represented by a true vortex and an opposite sign ‘virtual vortex’ on the other side of the wall. However, most animals do not swim near solid surfaces and thus near body vortex–vortex interactions in open-water swimmers have been poorly investigated. In this study, we examine the most energetically efficient metazoan swimmer known to date, the jellyfish Aurelia aurita , to elucida

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18

Chernodub, M. "Vortex profiles and vortex interactions at the electroweak crossover." Nuclear Physics B - Proceedings Supplements 83-84, no. 1-3 (2000): 571–73. http://dx.doi.org/10.1016/s0920-5632(00)00318-2.

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19

Chernodub, M. N., E. M. Ilgenfritz, and A. Schiller. "Vortex profiles and vortex interactions at the electroweak crossover." Nuclear Physics B - Proceedings Supplements 83-84 (April 2000): 571–73. http://dx.doi.org/10.1016/s0920-5632(00)91741-9.

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20

Zhang, Yu, Joseph Pedlosky, and Glenn R. Flierl. "Shelf Circulation and Cross-Shelf Transport out of a Bay Driven by Eddies from an Open-Ocean Current. Part I: Interaction between a Barotropic Vortex and a Steplike Topography." Journal of Physical Oceanography 41, no. 5 (2011): 889–910. http://dx.doi.org/10.1175/2010jpo4496.1.

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Abstract This paper examines interaction between a barotropic point vortex and a steplike topography with a bay-shaped shelf. The interaction is governed by two mechanisms: propagation of topographic Rossby waves and advection by the forcing vortex. Topographic waves are supported by the potential vorticity (PV) jump across the topography and propagate along the step only in one direction, having higher PV on the right. Near one side boundary of the bay, which is in the wave propagation direction and has a narrow shelf, waves are blocked by the boundary, inducing strong out-of-bay transport in

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21

Nguyen, Van Luc, Tomohiro Degawa, and Tomomi Uchiyama. "Numerical simulation of the interaction between a vortex ring and a bubble plume." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 9 (2019): 3192–224. http://dx.doi.org/10.1108/hff-12-2018-0734.

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Purpose This paper aims to provide discussions of a numerical method for bubbly flows and the interaction between a vortex ring and a bubble plume. Design/methodology/approach Small bubbles are released into quiescent water from a cylinder tip. They rise under the buoyant force, forming a plume. A vortex ring is launched vertically upward into the bubble plume. The interactions between the vortex ring and the bubble plume are numerically simulated using a semi-Lagrangian–Lagrangian approach composed of a vortex-in-cell method for the fluid phase and a Lagrangian description of the gas phase. F

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22

Forster, Kyle J., Sammy Diasinos, Graham Doig, and Tracie J. Barber. "Large eddy simulation of transient upstream/downstream vortex interactions." Journal of Fluid Mechanics 862 (January 9, 2019): 227–60. http://dx.doi.org/10.1017/jfm.2018.949.

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Experimentally validated large eddy simulations were performed on two NACA0012 vanes at various lateral offsets to observe the transient effects of the near field interactions between two streamwise vortices. The vanes were separated in the streamwise direction, allowing the upstream vortex to impact on the downstream geometry. These vanes were evaluated at an angle of incidence of $8^{\circ }$ and a Reynolds number of 70 000, with rear vane angle reversed to create a co-rotating or counter-rotating vortex pair. The downstream vortex merged with the upstream in the co-rotating condition, drive

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23

Renard, P. H., D. Thévenin, J. C. Rolon, and S. Candel. "Dynamics of flame/vortex interactions." Progress in Energy and Combustion Science 26, no. 3 (2000): 225–82. http://dx.doi.org/10.1016/s0360-1285(00)00002-2.

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24

Cutler, A. D., and P. Bradshaw. "Strong vortex/boundary layer interactions." Experiments in Fluids 14, no. 5 (1993): 321–32. http://dx.doi.org/10.1007/bf00189490.

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25

Cutler, A. D., and P. Bradshaw. "Strong vortex/boundary layer interactions." Experiments in Fluids 14, no. 6 (1993): 393–401. http://dx.doi.org/10.1007/bf00190193.

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26

Chorin, Alexandre Joel. "Hairpin removal in vortex interactions." Journal of Computational Physics 91, no. 1 (1990): 1–21. http://dx.doi.org/10.1016/0021-9991(90)90001-h.

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27

Chorin, Alexander J. "Hairpin removal in vortex interactions." Journal of Computational Physics 87, no. 2 (1990): 496. http://dx.doi.org/10.1016/0021-9991(90)90272-3.

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28

Rutland, Christopher J., and Joel H. Ferziger. "Simulations of flame-vortex interactions." Combustion and Flame 84, no. 3-4 (1991): 343–60. http://dx.doi.org/10.1016/0010-2180(91)90011-y.

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29

Folz, Patrick J. R., and Keiko K. Nomura. "A quantitative assessment of viscous asymmetric vortex pair interactions." Journal of Fluid Mechanics 829 (September 14, 2017): 1–30. http://dx.doi.org/10.1017/jfm.2017.527.

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The interactions of two like-signed vortices in viscous fluid are investigated using two-dimensional numerical simulations performed across a range of vortex strength ratios, $\unicode[STIX]{x1D6EC}=\unicode[STIX]{x1D6E4}_{1}/\unicode[STIX]{x1D6E4}_{2}\leqslant 1$, corresponding to vortices of circulation, $\unicode[STIX]{x1D6E4}_{i}$, with differing initial size and/or peak vorticity. In all cases, the vortices evolve by viscous diffusion before undergoing a primary convective interaction, which ultimately results in a single vortex. The post-interaction vortex is quantitatively evaluated in

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30

Horner, M. B., E. Saliveros, and R. A. McD Galbraith. "An experimental investigation of the oblique blade-vortex interaction." Aeronautical Journal 96, no. 955 (1992): 184–91. http://dx.doi.org/10.1017/s0001924000024830.

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AbstractThe experimental results of an oblique Blade-Vortex Interaction (BVI) study are presented. The quality of all pressure data reflects improvements in the Glasgow University BVI facility and in the method of reducing and presenting data. The data collected during oblique interactions is found qualitatively and quantitatively similar to that collected in corresponding parallel interactions, for interactions within ± 30° of parallel. Details of the pressure data are examined in the light of understanding gained from parallel BVI experimentation. The study highlights the effects of three di

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31

KALKHORAN, I. M., M. K. SMART, and F. Y. WANG. "Supersonic vortex breakdown during vortex/cylinder interaction." Journal of Fluid Mechanics 369 (August 25, 1998): 351–80. http://dx.doi.org/10.1017/s0022112098001566.

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The head-one interaction of a supersonic streamwise vortex with a circular cylinder reveals a vortex breakdown similar in many ways to that of incompressible vortex breakdown. In particular, the dramatic flow reorganization observed during the interaction resembles the conical vortex breakdown reported by Sarpkaya (1995) at high Reynolds number. In the present study, vortex breakdown is brought about when moderate and strong streamwise vortices encounter the bow shock in front of a circular cylinder at Mach 2.49. The main features of the vortex/cylinder interaction are the formation of a blunt

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32

Garmann, D. J., and M. R. Visbal. "Interactions of a streamwise-oriented vortex with a finite wing." Journal of Fluid Mechanics 767 (February 24, 2015): 782–810. http://dx.doi.org/10.1017/jfm.2015.51.

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AbstractA canonical study is developed to investigate the unsteady interactions of a streamwise-oriented vortex impinging upon a finite surface using high-fidelity simulation. As a model problem, an analytically defined vortex superimposed on a free stream is convected towards an aspect-ratio-six ($\mathit{AR}=6$) plate oriented at an angle of ${\it\alpha}=4^{\circ }$ and Reynolds number of $\mathit{Re}=20\,000$ in order to characterize the unsteady modes of interaction resulting from different spanwise positions of the incoming vortex. Outboard, tip-aligned and inboard positioning are shown t

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33

HULSHOFF, S. J., A. HIRSCHBERG, and G. C. J. HOFMANS. "Sound production of vortex–nozzle interactions." Journal of Fluid Mechanics 439 (July 23, 2001): 335–52. http://dx.doi.org/10.1017/s0022112001004554.

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The factors which affect the sound production of a vortex as it passes through a nozzle are investigated at both low and high Mach numbers using time-accurate inviscid-flow computations. Vortex circulation, initial position, and mean-flow Mach number are shown to be the primary factors which influence the amplitude and phase of the sound produced. Nozzle geometry and distribution of vorticity are also shown to play significant roles in determining the detailed form of the signal. Additionally, it is shown that solution bifurcations are possible at sufficiently large values of vortex circulatio

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34

Sakajo, Takashi, and Yuuki Shimizu. "Point vortex interactions on a toroidal surface." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2191 (2016): 20160271. http://dx.doi.org/10.1098/rspa.2016.0271.

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Owing to non-constant curvature and a handle structure, it is not easy to imagine intuitively how flows with vortex structures evolve on a toroidal surface compared with those in a plane, on a sphere and a flat torus. In order to cultivate an insight into vortex interactions on this manifold, we derive the evolution equation for N -point vortices from Green's function associated with the Laplace–Beltrami operator there, and we then formulate it as a Hamiltonian dynamical system with the help of the symplectic geometry and the uniformization theorem. Based on this Hamiltonian formulation, we sh

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35

LE DIZÈS, STÉPHANE, and ALBERTO VERGA. "Viscous interactions of two co-rotating vortices before merging." Journal of Fluid Mechanics 467 (September 24, 2002): 389–410. http://dx.doi.org/10.1017/s0022112002001532.

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The viscous evolution of two co-rotating vortices is analysed using direct two-dimensional numerical simulations of the Navier–Stokes equations. The article focuses on vortex interaction regimes before merging. Two parameters are varied: a steepness parameter n which measures the steepness of the initial vorticity profiles in a given family of profiles, and the Reynolds number Re (between 500 and 16 000). Two distinct relaxation processes are identified. The first one is non-viscous and corresponds to a rapid adaptation of each vortex to the external (strain) field generated by the other vorte

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36

Lentink, David, GertJan F. Van Heijst, Florian T. Muijres, and Johan L. Van Leeuwen. "Vortex interactions with flapping wings and fins can be unpredictable." Biology Letters 6, no. 3 (2010): 394–97. http://dx.doi.org/10.1098/rsbl.2009.0806.

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As they fly or swim, many animals generate a wake of vortices with their flapping fins and wings that reveals the dynamics of their locomotion. Previous studies have shown that the dynamic interaction of vortices in the wake with fins and wings can increase propulsive force. Here, we explore whether the dynamics of the vortex interactions could affect the predictability of propulsive forces. We studied the dynamics of the interactions between a symmetrically and periodically pitching and heaving foil and the vortices in its wake, in a soap-film tunnel. The phase-locked movie sequences reveal t

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37

Voropayev, S. I., and Ya D. Afanasyev. "Two-dimensional vortex-dipole interactions in a stratified fluid." Journal of Fluid Mechanics 236 (March 1992): 665–89. http://dx.doi.org/10.1017/s0022112092001575.

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Planar motion produced when a viscous fluid is forced from an initial state of rest is studied. We consider a vortex dipole produced by the action of a point force (Cantwell 1986), and a vortex quadrupole produced by the action of two equal forces of opposite direction. We also present results from an experimental investigation into the dynamics of the interactions between vortex dipoles as well as between vortex dipoles and a vertical wall in a stratified fluid. Theoretical consideration reveals that the dynamics of two-dimensional vortex-dipole interactions are determined by two main governi

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38

Zheng, Z. C., and W. Li. "Dependence of radiated sound frequency on vortex core dynamics in multiple vortex interactions." Aeronautical Journal 113, no. 1142 (2009): 233–42. http://dx.doi.org/10.1017/s0001924000002906.

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Abstract With both theoretical analysis and measurement data, it has been identified previously that there exists a robust sound emission from a pair of counter-rotating aircraft wake vortices at the frequency of unsteady vortex core rotation. In a vortex system with multiple vortices, the sound emission frequency can be subjected to change because of interactions among the vortices. The behaviour of the influence, indicated by the ratio between the core size and the distance of the vortices and the underlining vortex core dynamic mechanisms, is investigated in this study. A vortex particle me

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39

Carlson, Bailey, Al Habib Ullah, and Jordi Estevadeordal. "Experimental Investigation of Vortex-Tube Streamwise-Vorticity Characteristics and Interaction Effects with a Finite-Aspect-Ratio Wing." Fluids 5, no. 3 (2020): 122. http://dx.doi.org/10.3390/fluids5030122.

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An experimental study is conducted to analyze a streamwise-oriented vortex and investigate the unsteady interaction with a finite-aspect-ratio wing. A pressurized vortex tube is used to generate streamwise vortices in a wind tunnel and the resulting flow behavior is analyzed. The vortex tube, operated at various pressures, yields flows that evolve downstream under several freestream wind tunnel speeds. Flow measurements are performed using two- and three- dimensional (2D and 3D) particle image velocimetry to observe vortices and their freestream interactions from which velocity and vorticity d

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40

Koshel, Konstantin, Eugene Ryzhov, and Xavier Carton. "Vortex Interactions Subjected to Deformation Flows: A Review." Fluids 4, no. 1 (2019): 14. http://dx.doi.org/10.3390/fluids4010014.

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Deformation flows are the flows incorporating shear, strain and rotational components. These flows are ubiquitous in the geophysical flows, such as the ocean and atmosphere. They appear near almost any salience, such as isolated coherent structures (vortices and jets) and various fixed obstacles (submerged obstacles and continental boundaries). Fluid structures subject to such deformation flows may exhibit drastic changes in motion. In this review paper, we focus on the motion of a small number of coherent vortices embedded in deformation flows. Problems involving isolated one and two vortices

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41

Masson, C. A., R. B. Green, R. A. McD Galbraith, and F. N. Coton. "Experimental investigation of a loaded rotor blade's interaction with a single vortex." Aeronautical Journal 102, no. 1018 (1998): 451–57. http://dx.doi.org/10.1017/s000192400002769x.

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AbstractPresented in this paper are the preliminary results from a blade-vortex interaction (BVI) test series conducted in the University of Glasgow's 1·61m x 2·13m closed-return, low-speed windtunnel, in which a single vortex interaction with a rigid, loaded rotor blade was studied. This work is an extension of that by Horner and Galbraith, which describes the flow phenomena present during single vortex interaction with an unloaded blade. The paper presents blade surface pressure data recorded by 72 pressure transducers located in the outer regions of the blade during these interactions. Inte

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Adhikari, Prabal, and Jaehong Choi. "Magnetic vortices in the Abelian Higgs model with derivative interactions." International Journal of Modern Physics A 33, no. 36 (2018): 1850215. http://dx.doi.org/10.1142/s0217751x18502159.

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We study the properties of a single magnetic vortex and magnetic vortex lattices in a generalization of the Abelian Higgs model containing the simplest derivative interaction that preserves the [Formula: see text] gauge symmetry of the original model. The paper is motivated by the study of finite isospin chiral perturbation theory in a uniform, external magnetic field: since pions are Goldstone bosons of QCD (due to chiral symmetry breaking by the QCD vacuum), they interact through momentum-dependent terms. We find the asymptotic properties of single vortex solutions and compare them to the we

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Jaworski, J. W. "Sound from aeroelastic vortex–fibre interactions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, no. 2159 (2019): 20190071. http://dx.doi.org/10.1098/rsta.2019.0071.

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The motion of a line vortex moving past a one-dimensional flexible fibre is examined theoretically. A Schwarz–Christoffel conformal mapping enables the analytical solution of the potential flow field and its hydrodynamic moment on the flexible fibre, which is composed of a rigid segment constrained to angular motions on a wedge. The hydroelastic coupling of the vortex path and fibre motion affects the noise signature, which is evaluated for the special case of acoustically compact fibres embedded in a half plane. Results from this analysis attempt to address how the coupled interactions betwee

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Smith, G. B., and T. Wei. "Small-scale structure in colliding off-axis vortex rings." Journal of Fluid Mechanics 259 (January 25, 1994): 281–90. http://dx.doi.org/10.1017/s0022112094000133.

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Off-axis collisions of equal-strength vortex rings were experimentally examined. Two equal-strength vortices were generated which moved toward each other along parallel, but offset, trajectories. Two colour laser-induced fluorescence visualization techniques were used to observe these phenomena and gain insight into their importance in vortex interactions. The most prominent features of this interaction were rapid growth and rotation of the rings and formation of evenly spaced ringlets around the cores of the original rings. Large-scale motions are described using simple vortex induction argum

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ILIE, Marcel, and Augustin SEMENESCU. "AERODYNAMIC STUDIES OF AIRCRAFT ENGINE TURBINE STAGE." ANNALS OF THE ACADEMY OF ROMANIAN SCIENTISTS Series on ENGINEERING SCIENCES 14, no. 2 (2022): 5–18. http://dx.doi.org/10.56082/annalsarscieng.2022.2.5.

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The present research concerns the aerodynamic computational studies of stator-rotor turbine stage. The computational studies are carried out using the large-eddy simulation approach. In the aircraft engine compressor/turbine stage blade-vortex interactions occur. The present study aims at the understanding the blade-vortex interaction mechanism and its impact on the aerodynamics of rotor-stator compressor/turbine stages. The computational studies are carried out in a rotating frame of reference, for high-Reynolds number flow, Re = 1.3x105. The analysis reveals that the blade-vortex interaction

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Mishra, Prasad, Renganathan Sudharshan, and Kumar Ezhil. "Numerical study of flame/vortex interactions in 2-D Trapped Vortex Combustor." Thermal Science 18, no. 4 (2014): 1373–87. http://dx.doi.org/10.2298/tsci111006162m.

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The interactions between flame and vortex in a 2-D Trapped Vortex Combustor are investigated by simulating the Reynolds Averaged Navier Stokes (RANS) equations, for the following five cases namely (i) non-reacting (base) case, (ii) post-vortex ignition without premixing, (iii) post-vortex ignition with premixing, (iv) pre-vortex ignition without premixing and (v) pre-vortex ignition with premixing. For the post-vortex ignition without premixing case, the reactants are mixed well in the cavity resulting in a stable ?C? shaped flame along the vortex edge. Further, there is insignificant change i

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George, A. R., and A. S. Lyrintzis. "Acoustics of transonic blade-vortex interactions." AIAA Journal 26, no. 7 (1988): 769–76. http://dx.doi.org/10.2514/3.9968.

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Ferrell, Richard A., and Bumsoo Kyung. "Roton-vortex interactions in superfluid helium." Physical Review Letters 67, no. 8 (1991): 1003–6. http://dx.doi.org/10.1103/physrevlett.67.1003.

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Koumoutsakos, Petros. "Active control of vortex–wall interactions." Physics of Fluids 9, no. 12 (1997): 3808–16. http://dx.doi.org/10.1063/1.869515.

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Zhang, M. M., L. Cheng, and Y. Zhou. "Closed-loop controlled vortex-airfoil interactions." Physics of Fluids 18, no. 4 (2006): 046102. http://dx.doi.org/10.1063/1.2189287.

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