Computer modeling of the instability of a horizontal magnetic-fluid layer in a uniform magnetic field

Behavior of suspended magnetic and nonmagnetic micrometer-size particles in a micro-tube filled with a magnetic fluid is investigated by using the discrete particle method based on the simplified Stokesian dynamics in order to know the polishing process of inner wall of a tube. It is shown that the chain-like clusters of magnetic particles are surrounded by clusters of nonmagnetic particles in the presence of uniform magnetic field. The clusters are held in the field direction in case of rotation of the micro-tube and in case of rotation of magnetic field.

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1302 Heat Transfer Characteristics of Temperature-Sensitive Magnetic Fluid with Non-Magnetic Particles under Uniform Magnetic Field

The Proceedings of the Fluids engineering conference ◽

10.1299/jsmefed.2014._1302-1_ ◽

2014 ◽

Vol 2014 (0) ◽

pp. _1302-1_-_1302-2_

Author(s):

Koichi Sakagami ◽

Yuhiro Iwamoto ◽

Haruhiko Yamasaki ◽

Hiroshi Yamaguchi

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Magnetic Fluid ◽

Uniform Magnetic Field ◽

Magnetic Particles ◽

Temperature Sensitive ◽

Heat Transfer Characteristics ◽

Transfer Characteristics

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Characteristics of Ultrasound Propagation in a Magnetic Fluid Under Uniform Magnetic Field

Volume 2: Symposia, Parts A, B, and C ◽

10.1115/fedsm2003-45041 ◽

2003 ◽

Author(s):

Masaaki Motozawa ◽

Tatsuo Sawada

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Magnetic Fluid ◽

Uniform Magnetic Field ◽

Colloidal Particles ◽

Magnetic Field Intensity ◽

Magnetic Field Direction ◽

Ultrasound Propagation ◽

Ultrasonic Propagation ◽

The Magnetic Field

When an external magnetic field is applied to a magnetic fluid, some of the colloidal particles coagulate and form chain-like clusters. Properties of ultrasonic propagation wave are changed by these chain-like clusters. We carried out measurement of the ultrasonic propagation velocity in a magnetic fluid. Measurement were made by changing the magnetic field intensity from 0 mT to 570 mT, and the angle between the magnetic field direction and direction of the ultrasound propagation from 0° to 180°. The ultrasound frequencies were 1 MHz, 2 MHz and 4 MHz. Some of experimental results for the characteristics of ultrasound propagation in a magnetic fluid under a uniform magnetic field were reported.

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Dynamics of the Gas Bubbles in the Magnetic Fluid in the Non-Uniform Magnetic Field

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/581/1/012037 ◽

2019 ◽

Vol 581 ◽

pp. 012037 ◽

Cited By ~ 1

Author(s):

V M Polunin ◽

P A Ryapolov ◽

E ASokolov

Keyword(s):

Magnetic Field ◽

Magnetic Fluid ◽

Uniform Magnetic Field ◽

Gas Bubbles

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Magnetophoresis of microparticles in a magnetic liquid

Izvestiya vysshikh uchebnykh zavedenii. Fizika ◽

10.17223/00213411/64/3/99 ◽

2021 ◽

pp. 99-105

Author(s):

V.M. Polunin ◽

◽

P.A. Ryapolov ◽

V.G. Bashtovoy ◽

E.B. Postnikov ◽

...

Keyword(s):

Magnetic Field ◽

Magnetic Fluid ◽

Fluid Layer ◽

Inhomogeneous Magnetic Field ◽

Magnetic Liquid ◽

Reflection Of Light ◽

Ring Magnet ◽

And Diffusion ◽

The Magnetic Field ◽

Transmission And Reflection

An experimental setup has been developed for studying magnetophoresis in a layer of a magnetic fluid several millimeters thick by the method of transmission and reflection of light. In the experiment, we used the region of a ring magnet changing in sign of the magnetic field. The clarification of the central portion of the magnetic fluid layer, which is observed for several days, is interpreted by the fact that the concentration of particles is redistributed due to the processes of magnetophoresis of microparticles and diffusion of nanoparticles in an inhomogeneous magnetic field.

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