Fluid-flow-induced pattern formation in liquid crystals in a rotating magnetic field

1993 ◽  
Vol 48 (2) ◽  
pp. 1218-1227 ◽  
Author(s):  
Kalman B. Migler ◽  
Robert B. Meyer
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Liquid Crystals ◽  
Pattern Formation ◽  
Rotating Magnetic Field

Torque Measurements on Liquid Crystals in a Rotating Magnetic Field

1973 ◽  
Author(s):  
P. J. Flanders ◽  
S. Shtrikman ◽  
Hugh C. Wolfe ◽  
C. D. Graham ◽  
J. J. Rhyne
Keyword(s):  
Magnetic Field ◽  
Liquid Crystals ◽  
Rotating Magnetic Field ◽  
Torque Measurements

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.

Effect of Rotating Magnetic Field on Microstructure Evolution of Pb-Bi Alloys

2011 ◽  
Vol 311-313 ◽  
pp. 600-608
Author(s):  
Zhao Chen ◽  
Xiao Li Wen ◽  
Chang Le Chen
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Microstructure Evolution ◽  
Solidification Process ◽  
Nucleation And Growth ◽  
Primary Phase ◽  
Rotating Magnetic Field ◽  
Growth Behaviour ◽  
Solidification Behaviour ◽  
40 Hz

Solidification behaviour of Pb-Bi alloys under rotating magnetic field (RMF) was investigated experimentally to understand the effect of the frequency of RMF on the nucleation and growth behaviour. It was found that, as the increase of the rotating frequency, the grains are fragmented and refined gradually until a transition from columnar to equiaxed microstructures happens at a rotating frequency of 40 Hz. Moreover, the Bi concentration of the primary phase decreases and macrosegregation is eliminated effectively with RMF. These are due to the effect of RMF on the nucleation, growth and fluid flow in the solidification process.

Frequency effects of a rotating magnetic field on fluid flow in vertical cylinders

1997 ◽  
Author(s):  
Konstantin Mazuruk ◽  
Narayanan Ramachandran ◽  
Martin P. Volz ◽  
Donald C. Gillies
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Rotating Magnetic Field ◽  
Frequency Effects ◽  
Vertical Cylinders

Spirals in liquid crystals in a rotating magnetic field

1994 ◽  
Vol 71 (4) ◽  
pp. 412-420 ◽  
Author(s):  
Kalman B. Migler ◽  
Robert B. Meyer
Keyword(s):  
Magnetic Field ◽  
Liquid Crystals ◽  
Rotating Magnetic Field
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