Magnetochromatics resulted from optical gratings of magnetic fluid films subjected to perpendicular magnetic fields

2000 ◽  
Vol 88 (10) ◽  
pp. 5904-5908 ◽  
Author(s):  
Herng-Er Horng ◽  
Chin-Yih Hong ◽  
S. L. Lee ◽  
C. H. Ho ◽  
S. Y. Yang ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Fluid Films ◽  
Optical Gratings

Evidence of multiple states of ordered structures and a phase transition in magnetic fluid films under perpendicular magnetic fields

1999 ◽  
Vol 75 (15) ◽  
pp. 2196-2198 ◽  
Author(s):  
Chin-Yih Hong ◽  
Herng-Er Horng ◽  
F. C. Kuo ◽  
S. Y. Yang ◽  
H. C. Yang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Fluid Films ◽  
Ordered Structures

scholarly journals Optical anisotropy induced by external magnetic fields on magnetic fluid films

2001 ◽  
Vol 226-230 ◽  
pp. 1992-1994 ◽  
Author(s):  
S.Y Yang ◽  
W.S Tse ◽  
H.E Horng ◽  
H.C Yang ◽  
Chin-Yih Hong
Keyword(s):  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Optical Anisotropy ◽  
Fluid Films

Magnetic susceptibility of an organosilicon based magnetic fluid in electric and magnetic fields

2015 ◽  
Vol 41 (2) ◽  
pp. 200-202
Author(s):  
Yu. I. Dikanskii ◽  
D. V. Gladkikh ◽  
S. A. Kunikin ◽  
A. V. Radionov
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Electric And Magnetic Fields

scholarly journals Structure of the magnetic fluid film under alternating magnetic fields

2002 ◽  
Vol 252 ◽  
pp. 287-289 ◽  
Author(s):  
H.C Yang ◽  
B.Y Jeang ◽  
S.Y Yang ◽  
H.E Horng ◽  
T.P Huang ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Fluid Film ◽  
Alternating Magnetic Fields

Effect of initial states on the phase diagram of the structural pattern in magnetic fluid films under perpendicular magnetic field

2001 ◽  
Vol 79 (15) ◽  
pp. 2360-2362 ◽  
Author(s):  
Chin-Yih Hong ◽  
C. A. Chen ◽  
Chun-Hui Chen ◽  
H. E. Horng ◽  
S. Y. Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Magnetic Fluid ◽  
Perpendicular Magnetic Field ◽  
Fluid Films ◽  
Structural Pattern ◽  
Initial States

Labyrinthine and secondary wave instabilities of a miscible magnetic fluid drop in a Hele-Shaw cell

2017 ◽  
Vol 836 ◽  
pp. 374-396 ◽  
Author(s):  
Huanhao Li ◽  
Chun-Yi Kao ◽  
Chih-Yung Wen
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Flow Regime ◽  
Magnetic Fluid ◽  
Early Period ◽  
Secondary Wave ◽  
Initial Growth ◽  
Experimental Conditions ◽  
Fluid Drop ◽  
Hele Shaw Cell

A comprehensive experimental study is presented to analyse the instabilities of a magnetic fluid drop surrounded by miscible fluid confined in a Hele-Shaw cell. The experimental conditions include different magnetic fields (by varying the maximum pre-set magnetic field strengths,$H$, and sweep rates,$SR=\text{d}H_{t}/\text{d}t$, where$H_{t}$is the instant magnetic field strength), gap spans,$h$, and magnetic fluid samples, and are further coupled into a modified Péclect number$Pe^{\prime }$to evaluate the instabilities. Two distinct instabilities are induced by the external magnetic fields with different sweep rates: (i) a labyrinthine fingering instability, where small fingerings emerge around the initial circular interface in the early period, and (ii) secondary waves in the later period. Based on 81 sets of experimental conditions, the initial growth rate of the interfacial length,$\unicode[STIX]{x1D6FC}$, of the magnetic drop is found to increase linearly with$Pe^{\prime }$, indicating that$\unicode[STIX]{x1D6FC}$is proportional to the square root of the$SR$and$h^{3/2}$at the onset of the labyrinthine instability. In addition, secondary waves, which are characterised by the dimensionless wavelength$\unicode[STIX]{x1D6EC}=\unicode[STIX]{x1D706}/h$, can only be triggered when the three-dimensional magnetic microconvection is strong enough to make$Pe^{\prime }$exceed a critical value, i.e.$Pe^{\prime }>19\,000$, where$\unicode[STIX]{x1D706}$is the wavelength of the secondary wave. In this flow regime of high$Pe^{\prime }$, the length scale of the secondary wave instability is found to be$\unicode[STIX]{x1D6EC}=7\pm 1$, corresponding to the Stokes regime; meanwhile, in the flow regime of low$Pe^{\prime }$, the flow corresponds to the Hele-Shaw regime introduced by Fernandezet al.(J. Fluid Mech., vol. 451, 2002, pp. 239–260).

Photonic Crystal Fibers Bragg Grating Filled Magnetic Fluid for Magnetic Fields Sensing

2012 ◽  
Vol 10 (1) ◽  
pp. 465-470 ◽  
Author(s):  
Yong Zhao ◽  
Yuyan Zhang ◽  
Qi Wang ◽  
Riqing Lv
Keyword(s):  
Photonic Crystal ◽  
Magnetic Fields ◽  
Magnetic Fluid ◽  
Photonic Crystal Fibers ◽  
Bragg Grating ◽  
Crystal Fibers
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