Experimental Research on Self-repairing of Diverging Stepped Magnetic Fluid Seals with Single Magnetic Source

2021 ◽  
Vol 26 (4) ◽  
pp. 401-409
Author(s):  
Xiaolong Yang ◽  
Yuting Liu ◽  
Ruibo Zhang ◽  
Shanghan Gao
Keyword(s):  
Experimental Research ◽  
Magnetic Fluid ◽  
Magnetic Source

Experimental Research on the Characteristics of the Magnetic Compound Fluid by Grinding Solar Wafers

2014 ◽  
Vol 1055 ◽  
pp. 63-67
Author(s):  
Zhi Chun Chen ◽  
Bo Wu ◽  
Wei Fan ◽  
Ya Li Zhou
Keyword(s):  
Magnetic Field ◽  
Iron Powder ◽  
Experimental Research ◽  
Process Parameters ◽  
Magnetic Fluid ◽  
Microscopic Appearance ◽  
Abrasive Grains

This paper studies the grinding characteristics of magnetic compound fluid by conducting large amounts of experiments. Magnetic compound fluid (MCF) is formed by mixing abrasive grains, α-cellulose, iron powder and Magnetic-Fluid together according to a certain proportion. The experiments are conducted to test the effect of process parameters (such as different period of time, various speed of main axle and fluctuating magnetic field) on grinding results using Solar wafers. The results showed that the grinding surface of solar wafers is within Ra0.1 after 3 minutes and the microscopic appearance of the surface is flat and free of burns phenomenon.

scholarly journals Experimental research on effectiveness of the magnetic fluid seals for rotary shafts working in water

2007 ◽  
Vol 14 (4) ◽  
pp. 53-58 ◽  
Author(s):  
Zbigniew Szydło ◽  
Leszek Matuszewski
Keyword(s):  
Experimental Research ◽  
Magnetic Fluid ◽  
Magnetic Fluids ◽  
Point Of View ◽  
Liquid Environment ◽  
Sealing Unit ◽  
Research On Application

Experimental research on effectiveness of the magnetic fluid seals for rotary shafts working in water This paper presents course of research on ferro-fluidal seals used in water. The tests were carried out for a hydrophobic magnetic fluid and specially selected profiles of sealing lips at various linear velocities in sealing unit. Though the tests were preliminary their results showed that the research on application of magnetic fluids to seals working in liquid environment should be continued. From the point of view of development of ring drives the most important advantage of ferro-fluidal seals is their smallest drag as compared with seals of other types.

A NUMERICAL STUDY ON THE MAGNETIC FLUID FLOW IN A CHANNEL SURROUNDING A PERMANENT MAGNET UNDER TEMPERATURE FIELD

2007 ◽  
Vol 21 (19) ◽  
pp. 1271-1283 ◽  
Author(s):  
X. L. LI ◽  
K. L. YAO ◽  
Z. L. LIU
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Magnetic Fluid ◽  
Numerical Study ◽  
Drug Carrier ◽  
Temperature Fields ◽  
Gradient Magnetic Field ◽  
Local Skin ◽  
High Gradient ◽  
Magnetic Source

It was investigated that the magnetic fluid which can be the carrier of magnetic particles or magnetic drug carrier particles (MDCP) flows surrounding a permanent magnet in a channel under the influence of high gradient magnetic field and the temperature difference between upper and lower boundaries of the channel. It is considered that the magnetization of the fluid varies linearly with temperature and magnetic field intensity. The numerical solution of above model is described by a coupled and nonlinear system of PDEs. Results indicate that the presence of magnetic and temperature fields appreciably influence the flow field; vortexes arise almost around the magnetic source and also appear near the upper left and lower right boundaries. The temperature, local skin friction coefficient and rate of heat transfer are all affected by the magnitude and position of the magnetic source, they fluctuate evidently near the high gradient magnetic field area.

scholarly journals Experimental research on energy dissipation based on damping of magnetic fluid

2020 ◽  
Vol 7 (10) ◽  
pp. 106103
Author(s):  
Wenrong Yang ◽  
Jianzheng Su ◽  
Dejie Wei ◽  
Yumeng Zhang ◽  
Ying Chen ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Experimental Research ◽  
Magnetic Fluid

A magnetic super lattice

1987 ◽  
Vol 45 ◽  
pp. 360-361 ◽  
Author(s):  
M.D. Bentzon ◽  
J. v. Wonterghem ◽  
A. Thölén
Keyword(s):  
Thermal Decomposition ◽  
Oleic Acid ◽  
Magnetic Fluid ◽  
Magnetic Particles ◽  
Carbon Film ◽  
Thick Layer ◽  
Amorphous Iron ◽  
Super Lattice ◽  
Carrier Liquid ◽  
Median Diameter

We report on the oxidation of a magnetic fluid. The oxidation results in magnetic super lattice crystals. The “atoms” are hematite (α-Fe2O3) particles with a diameter ø = 6.9 nm and they are covered with a 1-2 nm thick layer of surfactant molecules.Magnetic fluids are homogeneous suspensions of small magnetic particles in a carrier liquid. To prevent agglomeration, the particles are coated with surfactant molecules. The magnetic fluid studied in this work was produced by thermal decomposition of Fe(CO)5 in Declin (carrier liquid) in the presence of oleic acid (surfactant). The magnetic particles consist of an amorphous iron-carbon alloy. For TEM investigation a droplet of the fluid was added to benzine and a carbon film on a copper net was immersed. When exposed to air the sample starts burning. The oxidation and electron irradiation transform the magnetic particles into hematite (α-Fe2O3) particles with a median diameter ø = 6.9 nm.

Secondary Transfer Effect of Contact

2009 ◽  
Vol 40 (2) ◽  
pp. 55-65 ◽  
Author(s):  
Thomas F. Pettigrew
Keyword(s):  
Cognitive Dissonance ◽  
Experimental Research ◽  
Intergroup Contact ◽  
Transfer Effect ◽  
Evaluative Conditioning ◽  
Transfer Effects ◽  
Secondary Transfer ◽  
Primary Reduction

This paper reviews the evidence for a secondary transfer effect of intergroup contact. Following a contact’s typical primary reduction in prejudice toward the outgroup involved in the contact, this effect involves a further, secondary reduction in prejudice toward noninvolved outgroups. Employing longitudinal German probability samples, we found that significant secondary transfer effects of intergroup contact exist, but they were limited to specific outgroups that are similar to the contacted outgroup in perceived stereotypes, status or stigma. Since the contact-prejudice link is bidirectional, the effect is inflated when prior prejudice reducing contact is not controlled. The strongest evidence derives from experimental research. Both cognitive (dissonance) and affective (evaluative conditioning) explanations for the effect are offered.

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