Vibration properties of a coupled system of a magnetic fluid layer and a magnetic rubber membrane

2008 ◽  
Vol 28 (1-2) ◽  
pp. 129-134
Author(s):  
Yasushi Ido ◽  
Tomoya Yamada ◽  
Kunio Shimada
Keyword(s):  
Magnetic Fluid ◽  
Fluid Layer ◽  
Coupled System ◽  
Rubber Membrane ◽  
Vibration Properties

A Coupled System of a Magnet and Magnetic Fluid in a U-Tube under Reciprocating Traveling Magnetic Field

2010 ◽  
Vol 670 ◽  
pp. 207-214 ◽  
Author(s):  
Yasushi Ido ◽  
Koichi Hayashi ◽  
Takahiro Kunitomo
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Vibration Mode ◽  
Low Frequency ◽  
Coupled System ◽  
The Other ◽  
Reciprocating Motion ◽  
Vibration Properties ◽  
Short Cylinder ◽  
Traveling Magnetic Field

A coupled system of a magnet and magnetic fluid is used as a piston in a U-tube. Applying reciprocating travelling magnetic field produces reciprocating motion of the coupled system. In this study, vibration properties of the coupled system are investigated experimentally. Three types of vibration mode of the coupled system appear and the mode depends on the frequency and intensity of travelling magnetic field and the shape of the magnet. Basically the coupled system follows the travelling magnetic field in the range of low frequency, while the system cannot follow the travelling field when the frequency of the travelling magnetic field is high. However, when the magnet is sphere or short cylinder, the other type of vibration appears in the range of low frequency and the coupled system intermittently tracks the travelling magnetic field.

Convection in Magnetic Fluids With Internal Heat Generation

1991 ◽  
Vol 113 (1) ◽  
pp. 122-127 ◽  
Author(s):  
N. Rudraiah ◽  
G. N. Sekhar
Keyword(s):  
Heat Source ◽  
Uniform Distribution ◽  
Heat Generation ◽  
Magnetic Fluid ◽  
Fluid Layer ◽  
Internal Heat ◽  
Magnetic Fluids ◽  
Internal Heat Generation ◽  
Stationary Convection ◽  
Expansion Technique

The effect of a uniform distribution of heat source on the onset of stationary convection in a horizontal Boussinesq magnetic fluid layer bounded by isothermal nonmagnetic boundaries is investigated. Solutions are obtained using a higher order Galerkin expansion technique, considering different isothermal boundary combinations (rigid-rigid, rigid-free, and free-free). It is found that the effect of internal magnetic number, due to a heat source, is to make the system more unstable. The results obtained, in the limiting cases, compare well with the existing literature.

Influence of carbon nanotubes on the dissipation of disturbances in a magnetic fluid layer

2021 ◽  
Vol 57 (2) ◽  
pp. 273-280
Keyword(s):  
Carbon Nanotubes ◽  
Elastic Properties ◽  
Magnetic Fluid ◽  
Fluid Layer ◽  
Viscous Friction ◽  
Multilayer Carbon Nanotubes

In this paper, processes of dissipation of disturbances of pressure and velocity in a magnetic fluid layer are experimentally studied. It is shown that the introduction of multi-layer carbon nanotubes (MCNT) up to 2wt.% into a magnetic fluid substantially increases the dissipation of disturbances due to increasing viscous friction and elastic properties of multilayer carbon nanotubes. Figs 9, Refs 9.

J2230103 Fundamental characteristics of a polyimide diaphragm actuator using a magnet surrounded by magnetic fluid layer

2014 ◽  
Vol 2014 (0) ◽  
pp. _J2230103--_J2230103-
Author(s):  
Satomitsu IMAI ◽  
Tatsuki TSUKIOKA ◽  
Syogo KANEMASU ◽  
Toshiki SAITO ◽  
Masanori EBISAWA
Keyword(s):  
Magnetic Fluid ◽  
Fluid Layer

scholarly journals Levitation and motion of a magnet partially immersed into a magnetic fluid

2018 ◽  
Vol 185 ◽  
pp. 09008 ◽  
Author(s):  
Daria Pelevina ◽  
Mikhail Kobzev ◽  
Sergey Kalmykov ◽  
Dmitrii Merkulov ◽  
Vera Naletova
Keyword(s):  
Mathematical Model ◽  
Magnetic Fluid ◽  
Horizontal Plane ◽  
Fluid Layer ◽  
Fluid Volume

The levitation of a permanent disc magnet partially immersed into a magnetic fluid volume on a horizontal plane is studied theoretically and experimentally. Motion of the magnet along a thin magnetic fluid layer is investigated experimentally. A mathematical model of the magnet dynamics is proposed.

Magnetophoresis of microparticles in a magnetic liquid

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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