Single-vortex fluctuations in layered superconductors: Electromagnetic coupling and crossover to strong pinning

2004 ◽  
Vol 69 (14) ◽  
Author(s):  
Jan Kierfeld
Keyword(s):  
Electromagnetic Coupling ◽  
Single Vortex ◽  
Layered Superconductors ◽  
Strong Pinning ◽  
Vortex Fluctuations

Role of vortex fluctuations in determining superconducting parameters from magnetization data for layered superconductors

1993 ◽  
Vol 70 (12) ◽  
pp. 1870-1873 ◽  
Author(s):  
V. G. Kogan ◽  
M. Ledvij ◽  
A. Yu. Simonov ◽  
J. H. Cho ◽  
D. C. Johnston
Keyword(s):  
Layered Superconductors ◽  
Magnetization Data ◽  
Vortex Fluctuations ◽  
Superconducting Parameters

scholarly journals Low-field phase diagram of layered superconductors: The role of electromagnetic coupling

1996 ◽  
Vol 54 (1) ◽  
pp. 72-75 ◽  
Author(s):  
Gianni Blatter ◽  
Vadim Geshkenbein ◽  
Anatoli Larkin ◽  
Henrik Nordborg
Keyword(s):  
Phase Diagram ◽  
Electromagnetic Coupling ◽  
Field Phase ◽  
Layered Superconductors ◽  
Low Field

scholarly journals Columnar defects and vortex fluctuations in layered superconductors

1996 ◽  
Vol 53 (14) ◽  
pp. R8855-R8858 ◽  
Author(s):  
A. E. Koshelev ◽  
P. Le Doussal ◽  
V. M. Vinokur
Keyword(s):  
Layered Superconductors ◽  
Columnar Defects ◽  
Vortex Fluctuations

Vortex fluctuations in layered superconductors and thin films

1993 ◽  
Vol 48 (14) ◽  
pp. 10448-10456 ◽  
Author(s):  
G. Blatter ◽  
B. Ivlev ◽  
H. Nordborg
Keyword(s):  
Thin Films ◽  
Layered Superconductors ◽  
Vortex Fluctuations

Charge solitons in layered superconductors

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-289-Pr10-291
Author(s):  
Yu. I. Latyshev ◽  
T. Yamashita
Keyword(s):  
Layered Superconductors

Chaos in body–vortex interactions

2010 ◽  
Vol 466 (2119) ◽  
pp. 1871-1891 ◽  
Author(s):  
Johan Roenby ◽  
Hassan Aref
Keyword(s):  
Body Shape ◽  
Mass Density ◽  
Relative Equilibrium ◽  
Large Body ◽  
Point Vortex ◽  
Cylindrical Body ◽  
The Body ◽  
Body Motion ◽  
Single Vortex ◽  
Vortex Interactions

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. The case of a circle is integrable. As the body is made slightly elliptic, a chaotic region grows from an unstable relative equilibrium of the circle-vortex case. The case of a cylindrical body of any shape moving in fluid otherwise at rest is also integrable. A second transition to chaos arises from the limit between rocking and tumbling motion of the body known in this case. In both instances, the chaos may be detected both in the body motion and in the vortex motion. The effect of increasing body mass at a fixed body shape is to damp the chaos.

scholarly journals Influence of the Submerged Entry Nozzle’s Bottom Well on the Characteristics of Its Exit Jets

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 398
Author(s):  
Jesus Gonzalez-Trejo ◽  
Cesar A. Real-Ramirez ◽  
Jose Raul Miranda-Tello ◽  
Ruslan Gabbasov ◽  
Ignacio Carvajal-Mariscal ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Liquid Steel ◽  
Mold Wall ◽  
Casting Machine ◽  
Submerged Entry Nozzle ◽  
Central Plane ◽  
Impact Point ◽  
Single Vortex ◽  
Hydrodynamic Analysis ◽  
Principal Characteristics

In vertical continuous casting machines the liquid steel from the tundish is poured into the mold through the Submerged Entry Nozzle (SEN). The shape and direction of the SEN exit jets affect the liquid steel dynamics inside the mold. This work quantifies the effect of the SEN pool on the principal characteristics of the jets emerging from it, precisely, the shape, the spread angles, and the mold impact point. Experimental and numerical simulations were carried out using a SEN simplified model, a square-shaped bore nozzle with square-shaped outlet ports whose length is minimal. These experiments showed two well-defined behaviors. When a single vortex dominates the hydrodynamics inside the simplified SEN, the exit jets spread out and are misaligned about the mold’s central plane. On the contrary, when the inner flow pattern shows two vortexes, the exit jets are compact and parallel to the mold wide walls. The measured difference on the jet’s falling angles is 5°, approximately, which implies that in an actual casting machine, the impingement point at the narrow mold wall would have a variation of 0.150 m. This hydrodynamic analysis would help design new SENs for continuous casting machines that improve steel quality.

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