Magnetic field induced suppression of vortex flow resistance in superconductors with periodic pinning centers

2006 ◽  
Vol 437-438 ◽  
pp. 345-348 ◽  
Author(s):  
R. Villar ◽  
V.V. Pryadun ◽  
J. Sierra ◽  
F.G. Aliev ◽  
E. González ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Flow Resistance ◽  
Vortex Flow ◽  
Periodic Pinning ◽  
Pinning Centers

Effects of magnetic field on blood flow with suspended copper nanoparticles through an artery with overlapping stenosis

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
C. Umadevi ◽  
G. Harpriya ◽  
M. Dhange ◽  
G. Nageswari
Keyword(s):  
Magnetic Field ◽  
Blood Flow ◽  
Shear Stress ◽  
Wall Shear Stress ◽  
Copper Nanoparticles ◽  
Analytical Solutions ◽  
Biomedical Applications ◽  
Flow Resistance ◽  
Cardiac Diseases ◽  
Stenosed Artery

The flow of blood mixed with copper nanoparticles in an overlapping stenosed artery is reported in the presence of a magnetic field. The presence of stenosis is known to impede blood flow and to be the cause of different cardiac diseases. The governing nonlinear equations are rendered dimensionless and attempted under the conditions of mild stenosis. The analytical solutions for velocity, resistance to the flow, wall shear stress, temperature, and streamlines are obtained and analyzed through graphs. The obtained outcomes show that the temperature variation in copper nanoparticles concentrated blood is more and flow resistance is less when compared to pure blood. The investigations reveal that copper nanoparticles are effective to reduce the hemodynamics of stenosis and could be helpful in biomedical applications.

Direct Determination of the Velocity of Vortices in High-Tc Superconductors by a Non-Equilibrium Method

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3288-3291
Author(s):  
I. Kirschner ◽  
R. Laiho ◽  
A. C. Bódi ◽  
E. Lähderanta ◽  
I. Vajda
Keyword(s):  
Magnetic Field ◽  
Temperature Gradient ◽  
Vortex Motion ◽  
Direct Determination ◽  
Field Investigation ◽  
High Tc Superconductors ◽  
High Tc ◽  
Pinning Centers ◽  
Non Equilibrium

As is shown, thermally assisted vortex motion can come into being in high-T c superconductors due to the applied temperature gradient. Its behavior strongly depends on the local and global microstructure of the samples, moreover on the temperature and magnetic field. Investigation of the density, size and intensity of the pinning centers of specimens leads to the conclusion that the higher homogeneity immediately weakens and the lower one strenghtens the pinning, thus the former promotes and the latter impedes the vortex motion. The non-equilibrium experimental technique together with a.c. susceptibility measurements render possible the direct determination of the velocity of vortices. Depending on the actual microstructural state of samples it has the values between 6 × 10-2 mm/s and 18 × 10-2 mm/s in the case of Y-Ba-Cu-O specimens investigated.

Effect of the Earth’s Magnetic Field on the Electric-Vortex-Flow Structure

2018 ◽  
Vol 63 (11) ◽  
pp. 447-450 ◽  
Author(s):  
D. A. Vinogradov ◽  
Yu. P. Ivochkin ◽  
I. O. Teplyakov
Keyword(s):  
Magnetic Field ◽  
Flow Structure ◽  
Vortex Flow ◽  
Earth’S Magnetic Field ◽  
Earth's Magnetic Field

Vortex Flow Controllers in Sanitary Engineering

1984 ◽  
Vol 106 (2) ◽  
pp. 129-133 ◽  
Author(s):  
H. Brombach
Keyword(s):  
Flow Control ◽  
Flow Pattern ◽  
Flow Resistance ◽  
Vortex Flow ◽  
Vortex Chamber ◽  
Control Problems ◽  
Inlet Port ◽  
Input Pressure ◽  
Conical Vortex ◽  
Moving Parts

Flow control problems in combined sewerage systems can be solved with the aid of a new variation of the vortex amplifier. This valve has no moving parts, and comes under the category of pure fluidics; it has a conical vortex chamber and a single inlet port. Depending on the level of water in the vortex chamber the flow pattern may be either axially symmetrical or axially asymmetrical. This effect enables the device to alter its flow resistance in response to the input pressure. Several hundred of this type of the flow controller are already in operation. An example of their application is described below.

MAGNETIC HYSTERESIS OF HIGH-TEMPERATURE YBa2Cu3Ox-AgO SUPERCONDUCTORS: EXPLANATION OF MAGNETIC SUSPENSION

1988 ◽  
Vol 02 (07) ◽  
pp. 869-874 ◽  
Author(s):  
C.Y. HUANG ◽  
Y. SHAPIRA ◽  
E.J. MCNIFF ◽  
P.N. PETERS ◽  
B.B. SCHWARTZ ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Simple Model ◽  
Hysteresis Loop ◽  
Applied Magnetic Field ◽  
Magnetic Hysteresis ◽  
Magnetic Suspension ◽  
Pinning Centers ◽  
Strong Pinning

We have measured the magnetization M of superconducting YBa 2 Cu 3 O x- AgO composites with T c approximately equal to 92K as a function of an applied magnetic field H at 77 and 87K. A very pronounced M-H hysteresis loop occurs even at 87K, indicating the presence of extremely strong pinning centers. The results of these measurements, together with a simple model, explain quantitatively why these superconductors could be suspended below a magnet.

Oscillations of Josephson-Vortex Flow Resistance in Narrow Intrinsic Josephson Junctions

2005 ◽  
Vol 15 (2) ◽  
pp. 912-915 ◽  
Author(s):  
T. Hatano ◽  
H. Wang ◽  
S. Kim ◽  
S. Urayama ◽  
S. Kawakami ◽  
...  
Keyword(s):  
Josephson Junctions ◽  
Flow Resistance ◽  
Vortex Flow ◽  
Josephson Vortex ◽  
Intrinsic Josephson Junctions

1103 Magnetic field control of mode bifurcation on magnetic fluid Taylor-Couette vortex flow with small aspect ratio

2005 ◽  
Vol 2005 (0) ◽  
pp. 159
Author(s):  
Daisuke ITO ◽  
Toshikazu KOTAKA ◽  
Hiroshige KIKURA ◽  
Masanori ARITOMI ◽  
Yasushi TAKEDA
Keyword(s):  
Magnetic Field ◽  
Aspect Ratio ◽  
Magnetic Fluid ◽  
Vortex Flow ◽  
Small Aspect Ratio ◽  
Field Control ◽  
Taylor Couette
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