Electric Current of Ferrofluid Depending on Temperature

2020 ◽  
Vol 833 ◽  
pp. 162-170
Author(s):  
Min Dai
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electric Current ◽  
Electric Energy ◽  
Carrier Liquid ◽  
The Relationship ◽  
Theory And Experiment

Without external magnetic field, the relationship between electric current of ferrofluid (MF) and temperature is discussed. The electric current is increasing linearly with temperature rising in ferrofluid with Fe3O4 particles distributed into water (MF-Fe3O4-W). Through theory and experiment proved, the carrier liquid only in MF-Fe3O4-W could not decide the ability of delivering electric energy of MF-Fe3O4-W. The electric current would be contributed to the movement of free electric charges (or ions) and colliding of electric polarized particles in MF-Fe3O4-W.

scholarly journals 50. Magneto-hydrostatic equilibrium in an external magnetic field

1958 ◽  
Vol 6 ◽  
pp. 499-503 ◽  
Author(s):  
P. A. Sweet
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electric Current ◽  
Virial Theorem ◽  
Magnetic Energy ◽  
Hydrostatic Equilibrium

The expression ∫∫∫all space ΔH2dv for a change in magnetic energy is shown to be incorrect when applied to a body carrying an electric current and situated in an external magnetic field. A modified expression is derived.Chandrasekhar's form of the virial theorem in a magnetic field is extended to the case where an external magnetic field is present.

The Simulated Calculation of the First Order Buoyancy Force under Different Relative Permeability of Ferrofluid

2013 ◽  
Vol 303-306 ◽  
pp. 22-25 ◽  
Author(s):  
Qiang Li ◽  
Zuo Bin Yuan ◽  
Yong Ming Yang ◽  
Cheng Hu
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Relative Permeability ◽  
Buoyancy Force ◽  
First Order ◽  
Simulated Calculation ◽  
The Relationship

In this paper, the first order buoyancy force of ferrofluid is simulated calculation under external magnetic field in ferrofluid devices. The relationship between first order buoyancy force and displacement of nonmagnetic body under different relative permeability of ferrofluid，and the relationship between first order buoyancy force and relative permeability of ferrofluid are obtained.

scholarly journals Rotation induced by uniform and non-uniform magnetic fields in a conducting fluid carrying an electric current

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112641-112645 ◽  
Author(s):  
R. Shirsavar ◽  
M. Nasiri ◽  
A. Amjadi ◽  
A. Nejati ◽  
S. O. Sobhani ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Electric Current ◽  
Conducting Fluid

External magnetic field induces controllable rotation in a conducting fluid carrying an electric current.

scholarly journals THE RELATIONSHIP BETWEEN INTERNAL AND EXTERNAL MAGNETIC FIELD IN YBa2Cu3O7 TUBE

1989 ◽  
Vol 38 (6) ◽  
pp. 1016
Author(s):  
XU FENG-ZHI ◽  
YANG PEI-RAN ◽  
CHEN LIB ◽  
CHEN XIAO-LAN ◽  
CHAI ZHANG ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
The Relationship

scholarly journals Impossibility of superconductivity electric flow

2016 ◽  
Vol 2 (3) ◽  
pp. 119-132
Author(s):  
V K Fedyukin
Keyword(s):  
Magnetic Field ◽  
Electric Current ◽  
Current Model ◽  
Technical Problem ◽  
Electric Energy ◽  
Physical Nature ◽  
External Electromagnetic Field ◽  
Current Theory ◽  
Cryogenic Temperatures ◽  
Adequate Theory

The solution of an old and urgent scientific and technical problem of superconductivity of electric current is proposed. Discrepancies to the facts and internal contradictions of a hypothesis of superconductivity of electric current by bodies, in the conditions of cryogenic temperatures are revealed. The new (alternate) comprehension of an essence and the adequate theory of the phenomenon which is inaccurately called by the low-temperature superconductivity of electric current without resistance is formulated. The analysis of an Ohm's law and its restrictions proves impossibility of emergence of superconductivity. It is claimed that when cooling the conductor its resistance increases, but does not decrease. When overcooling the conductor there is an isolation of electric current by it. The two-current model and the beginnings of the corresponding theory of an electrical conductivity are offered. It is shown that according to the actual two-current theory of distribution (current) of electric energy on the conductor, superconductivity cannot be. The same conclusion is proved by the law of Joule-Lenz and the facts of increase in resistance from action on the conductor of an external magnetic field and decrease of temperature of the conductor. It is proved that the physical nature of resistance consists in counteraction of an external electromagnetic field (electricity) to the movement on the conductor from the diamagnetic field self-induced in it. It is claimed that at deep overcooling the diamagnetization of the conductor becomes more magnetic field of electricity and the conductor turns into the superdiamagnetic electroisolation center (dielectric). Replacement of the inaccurate doctrine about superconductivity of electricity on long ago the alternate and most reasonable theory of a cold superdiamagnetization of substances offered by the author of this article allows to solve many problems of practical use of the phenomenon of a superdiamagnetization during creation of new processes and perspective technique of the future.

The influence of a cylindrical cathode on the electro-vortex flow of liquid metal: Numerical simulations and laboratory experiments

2021 ◽  
Author(s):  
Vladislav Eltishchev ◽  
Sergei Mandrykin ◽  
Ilya Kolesnichenko
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Electric Current ◽  
Laboratory Experiments ◽  
Vortex Flow ◽  
Qualitative Change ◽  
Critical Magnetic Field ◽  
Current Application ◽  
Cylindrical Cell

Abstract The electro-vortex flow of liquid metal in a cylindrical cell, placed into external vertical magnetic field, in case of axial electric current application is studied numerically and experimentally. The results are compared to those previously obtained in case of a localized electric current application. In the absence of the external magnetic field, the comparison shows no qualitative change in the flow structure. In presence of the external magnetic field, a poloidal motion is suppressed. A critical magnetic field of poloidal suppression is shown to be approximately 50% higher in case of axial electric current application.

scholarly journals Dark Current and Magnetic Field in Liquid

2021 ◽  
Vol 3 (6) ◽  
pp. 21-24
Author(s):  
S. A. G Erasimov
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Electric Current ◽  
Dark Current ◽  
Metal Contact ◽  
Clean Water ◽  
Aluminum Electrodes ◽  
The Magnetic Field

The dark electric current arising from the contact of aluminum with clean water decreases with an increase in the induction of the external magnetic field. Changing the distance between the source of the magnetic field and the aluminum electrodes makes it possible to determine the region of formation of the dark current. It turns out that this occurs in the area of liquid-metal contact where the curvature of the electrodes is maximal.

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