Magnetic fluid motion driven by a high-frequency rotating magnetic field

1996 ◽  
Vol 31 (1) ◽  
pp. 14-17 ◽  
Author(s):  
A. F. Pshenichnikov
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
High Frequency ◽  
Fluid Motion ◽  
Rotating Magnetic Field

scholarly journals Influence of high frequency rotating magnetic field on the effect of heating magnetic fluid

2021 ◽  
Vol 4 (1) ◽  
pp. 015-018
Author(s):  
Skumiel Andrzej
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
High Frequency ◽  
Magnetic Relaxation ◽  
Thermal Power ◽  
Relaxation Times ◽  
Experimental Studies ◽  
Rotation Period ◽  
Rotating Magnetic Field ◽  
The Magnetic Field

The article describes the necessary conditions for the phenomenon of thermal energy release in a magnetic fluid placed in a high-frequency rotating magnetic field. The minimum amplitude of the magnetic field was calculated and the thermal power released (by the rotating spherical nanoparticles in the viscous medium) was estimated. The estimations were based on the assumption that the magnetic relaxation times (τN and τB) and the magnetic field rotation period (τrot) meet the condition: τN>>τrot>>τB. The principle of operation and construction of the device generating a high-frequency rotating magnetic field is described. Preliminary experimental studies were carried out using a magnetic fluid with magnetite nanoparticles that indicated magnetic relaxation as the cause of the released heat. The value of the absorption rate in the experiment and its dependence on the strength of the magnetic field were determined.

Swirling Flow of Magnetic Fluid in Multi-Pole Rotating Magnetic Field

2003 ◽  
Author(s):  
Kenichi Kamioka ◽  
Ryuichiro Yamane
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Circular Cylinder ◽  
Phase Velocity ◽  
Magnetic Fluid ◽  
Swirling Flow ◽  
Peak Velocity ◽  
Rotating Magnetic Field ◽  
Outer Periphery ◽  
The Magnetic Field

The experiments are conducted on the magnetic fluid flow induced by the multi-pole rotating magnetic field in a circular cylinder. The numbers of poles are two, four, six, eight and twelve. The applied electric current and frequency are 2∼6 A and 20∼60 Hz, respectively. The peak velocity of the flow increases with the increase in the strength and the phase velocity of the magnetic field. As the increase in the number of poles, the flow shifts to the outer periphery.

Behavior of a magnetic fluid microdrop in a rotating magnetic field

1994 ◽  
Vol 72 (17) ◽  
pp. 2705-2708 ◽  
Author(s):  
J.-C. Bacri ◽  
A. O. Cebers ◽  
R. Perzynski
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Rotating Magnetic Field

Dynamic Effects in a Magnetic Fluid with Microdrops of Concentrated Phase in a Rotating Magnetic Field

2019 ◽  
Vol 64 (3) ◽  
pp. 337-341
Author(s):  
Yu. I. Dikanskii ◽  
M. A. Bedzhanyan ◽  
A. A. Kolesnikova ◽  
A. Yu. Gora ◽  
A. V. Chernyshev
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Rotating Magnetic Field ◽  
Dynamic Effects

Liquid-metal flow in a finite-length cylinder with a high-frequency rotating magnetic field

2001 ◽  
Vol 436 ◽  
pp. 131-143 ◽  
Author(s):  
L. MARTIN WITKOWSKI ◽  
P. MARTY ◽  
J. S. WALKER
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Finite Length ◽  
High Frequency ◽  
Metal Flow ◽  
Skin Depth ◽  
The Body ◽  
Rotating Magnetic Field ◽  
Field Frequency ◽  
Liquid Metal Flow

A liquid-metal flow driven by a rotating magnetic field in a finite-length cylinder is studied numerically as a function of the field frequency. In the high-frequency case, the magnetic field is expelled from the liquid-metal except in a skin-depth layer along the side and top walls of the cylinder. In the corner region, where the skin-depth layers intersect, the body force exhibits a large positive and negative azimuthal component as well as inward radial and axial components which are rotational. The flows for various frequencies are compared to the low-frequency flow.

The Influence of a Rotating Magnetic Field on the Sample with Magnetizable Materials near the Vessel Bottom

2015 ◽  
Vol 233-234 ◽  
pp. 343-346
Author(s):  
Daria Pelevina ◽  
Vladimir Turkov ◽  
Sergey Kalmykov ◽  
Vera Naletova
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Translational Motion ◽  
Rotating Magnetic Field ◽  
Field Frequency ◽  
Translation Motion ◽  
Vessel Bottom

The rotation and translational motion of the samples with a magnetizable material alonga bottom of a vessel in a uniform applied rotating magnetic field are examined experimentally. Weconsider a magnetic fluid (MF) drop and a body with a magnetizable polymer (MP). The phenomenaof the change of the direction of the translation motion at some field frequency is observed only forthe MF drop.

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