Absolute instability of an interface between two magnetic fluids in the presence of a tangential velocity discontinuity and an external magnetic field

1995 ◽  
Vol 30 (5) ◽  
pp. 661-665
Author(s):  
P. A. Yakubenko
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Tangential Velocity ◽  
Magnetic Fluids ◽  
Absolute Instability ◽  
Velocity Discontinuity

Slipping stream instability in anisotropic plasma with magnetic shear

1968 ◽  
Vol 2 (2) ◽  
pp. 181-187 ◽  
Author(s):  
S. S. Rao ◽  
G. L. Kalra ◽  
S. P. Talwar
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Tangential Velocity ◽  
Anisotropic Plasma ◽  
The Other ◽  
Magnetic Shear ◽  
Velocity Discontinuity ◽  
Special Case ◽  
The Magnetic Field ◽  
Stream Instability

Starting with the Chew, Goldberger & Low equations, an analysis is made of instability arising due to a tangential velocity discontinuity in a dilute plasma. The velocities on either side are parallel but oppositely directed. Two cases are considered: (i) the magnetic field is uniform and everywhere transverse to the motion, and (ii) the magnetic field vectors on either side are orthogonal, being parallel to the motion on one side and perpendicular on the other. The conditions for instability are obtained and it is found that the effect of magnetic field is destabilizing in both cases. The effect of orthogonality of magnetic fields on the conventional fire-hose instability for a uniform, static plasma is also discussed as special case.

Magnetic Properties of Frozen Magneto-Active Elastomers

2009 ◽  
Vol 152-153 ◽  
pp. 190-193 ◽  
Author(s):  
G.V. Stepanov ◽  
Dmitry Yu. Borin ◽  
Stefan Odenbach ◽  
A.I. Gorbunov
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
External Magnetic Field ◽  
Carbonyl Iron ◽  
Magnetic Fluids ◽  
Zero Field ◽  
Iron Particles ◽  
Temperature Dependent ◽  
Magnetization Measurements ◽  
Temperature Dependent Magnetization

In the present paper we report temperature dependent magnetization measurements done on a magneto-active elastomers (MAEs) consisting of a siloxane rubber filled with carbonyl iron particles. The experiments performed in this study are similar to the conventional Zero-Field-Cooled and Field-Cooled magnetic tests. To the best of our knowledge, this approach, successfully used for studies on magnetic fluids, has never ever been applied to MAE. This test allowed us to reveal the effect of change of MAE structure under the action of an external magnetic field.

scholarly journals Acoustic Properties of Magnetic Fluids Based on Transformer Oil Under Magnetic Field

2013 ◽  
Vol 64 (6) ◽  
pp. 381-385 ◽  
Author(s):  
Jozef Kúdelčík ◽  
Peter Bury ◽  
Peter Kopčanský ◽  
Milan Timko ◽  
Vlasta Závišová
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Structural Changes ◽  
Magnetic Moments ◽  
Magnetic Fluids ◽  
Transformer Oil ◽  
Acoustic Properties ◽  
Acoustic Spectroscopy ◽  
Long Time ◽  
The Magnetic Field

Abstract The structural changes in magnetic fluids based on transformer oil TECHNOL and MOGUL upon the effect of an external magnetic field and temperature were studied by acoustic spectroscopy. When a magnetic field is increased, the interaction between the magnetic field and the magnetic moments of the nanoparticles leads to the aggregation of magnetic nanoparticles and following clusters formation. However, the temperature of magnetic fluids has also very important influence on the structural changes because of the mechanism of thermal motion that acts against the cluster creation. The live time of clusters have relative long time scale for the magnetic fluid based on TECHNOL, while for MOGUL is quite short.

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