Magnetoviscosity of dilute magnetic fluids in oscillating and rotating magnetic fields

2010 ◽  
Vol 22 (4) ◽  
pp. 043304 ◽  
Author(s):  
Jorge H. Sánchez ◽  
Carlos Rinaldi
Keyword(s):  
Magnetic Fields ◽  
Magnetic Fluids ◽  
Rotating Magnetic Fields

Rheology and Behavior of Magnetic Fluids in Alternating/Rotating Magnetic Fields

2003 ◽  
Author(s):  
Carlos Rinaldi ◽  
Xiaowei He ◽  
Adam Rosenthal ◽  
Thomas Franklin ◽  
Cory Lorenz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Fluids ◽  
Rotating Magnetic Fields ◽  
Magnetic Field Rotation ◽  
Three Phase ◽  
Field Rotation ◽  
And Behavior ◽  
The Magnetic Field ◽  
Cylindrical Test

The rheology and behavior of magnetic fluids in the presence of time-varying magnetic fields is illustrated through three sets of experiments. The first involves measurements of ferrofluid torque on a cylindrical spindle under applied uniform rotating magnetic fields. We measure the torque required to restrain a stationary cylindrical test wall in contact with aqueous ferrofluids subjected to the rotating uniform magnetic field generated by a three-phase AC 2-pole motor stator winding. The torque is found to scale linearly with volume, and to be a function of the applied magnetic field amplitude, frequency and direction of rotation. Measurements show that for ferrofluid entirely inside the cylindrical test wall the torque points in the same direction as the magnetic field rotation pseudovector, whereas for ferrofluid entirely outside the cylindrical wall the torque points in the direction opposite to the field rotation pseudovector. The second set of experiments explores the formation of ordered ferrofluid structures in the gap of a Hele-Shaw cell subjected to simultaneous vertical DC and in-plane horizontal rotating magnetic fields. Finally, the third set of experiments illustrates the effect of applied DC fields on the shape of ferrofluid jets and sheets.

Macroscopic and Microscopic Structural Analyses of Needle-Shaped Condensed Phases in Magnetic Fluids under External Magnetic Fields

2020 ◽  
Author(s):  
Hiroaki Mamiya ◽  
Hironori Sudo ◽  
Jhon L. Cuya Huaman ◽  
Kazumasa Suzuki ◽  
Hiroshi Miyamura ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetic Fluids ◽  
Condensed Phases

Earth optimization of space experiment on growth of germanium by floating-zone technique with the use of rotating magnetic fields

2001 ◽  
Vol 46 (1) ◽  
pp. 148-153 ◽  
Author(s):  
A. V. Kartavykh ◽  
É. S. Kopeliovich ◽  
M. G. Mil’vidskii ◽  
V. V. Rakov
Keyword(s):  
Magnetic Fields ◽  
Space Experiment ◽  
Floating Zone ◽  
Rotating Magnetic Fields

Eddy current tomography using rotating magnetic fields for deep SQUID NDE

1997 ◽  
Vol 10 (12) ◽  
pp. 901-903
Author(s):  
A Haller ◽  
Y Tavrin ◽  
H-J Krause ◽  
P David ◽  
A I Braginski
Keyword(s):  
Magnetic Fields ◽  
Eddy Current ◽  
Rotating Magnetic Fields

scholarly journals Kink instabilities in jets from rotating magnetic fields

2008 ◽  
Vol 492 (3) ◽  
pp. 621-630 ◽  
Author(s):  
R. Moll ◽  
H. C. Spruit ◽  
M. Obergaulinger
Keyword(s):  
Magnetic Fields ◽  
Rotating Magnetic Fields

scholarly journals The hardening of metals by rotating magnetic fields

1931 ◽  
Vol 130 (814) ◽  
pp. 514-523 ◽  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Work Hardening ◽  
Rotating Magnetic Fields ◽  
Hardening Process ◽  
Hard Steel ◽  
Steel Balls ◽  
Hardened Condition

In a previous paper by the author experiments were described in which the hardness of various metals was increased by rotating them in a magnetic field. It had been observed that metals in a work-hardened condition, and in particular hard steel which had been super-hardened by the “Cloudburst” process of bombardment with steel balls, exhibit a propensity to become still harder by a process of ageing, the spontaneous increase of hardness commencing with the termination of the work-hardening process, and contiuning during a period of several hours or days.

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