Intensification of magnetic field by concentrate-and-stretch of magnetic flux lines

1998 ◽  
Vol 10 (2) ◽  
pp. 457-468 ◽  
Author(s):  
Hideaki Kitauchi ◽  
Shigeo Kida
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Flux Lines ◽  
Magnetic Flux Lines

Magnetic Circuit Simulation for Magnetorheological (MR) Fluids Testing Rig in Squeeze Mode

2010 ◽  
Vol 123-125 ◽  
pp. 991-994 ◽  
Author(s):  
Izwan Ismail ◽  
Saiful Amri Mazlan ◽  
Abdul Ghani Olabi
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Field Distribution ◽  
Circuit Simulation ◽  
Magnetic Field Distribution ◽  
Mr Fluid ◽  
Flux Lines ◽  
Mr Fluids ◽  
Magnetic Flux Lines ◽  
The Magnetic Field

In this study, a testing rig in squeeze was designed and developed with the ability to conduct various tests especially for quasi-static squeezing at different values of magnetic field strength. Finite Element Method Magnetics (FEMM) was utilized to simulate the magnetic field distribution and magnetic flux lines generation from electromagnetic coil to the testing rig. Tests were conducted with two types of MR fluid. MRF-132DG was used to obtain the behaviour of MR fluid, while synthesized epoxy-based MR fluid was used for investigating the magnetic field distribution with regards to particle chains arrangement. Simulation results of the rig design showed that the magnetic flux density was well distributed across the tested materials. Magnetic flux lines were aligned with force direction to perform squeeze tests. Preliminary experimental results showed that stress-strain pattern of MR fluids were in agreement with previous results. The epoxy-based MR samples produced excellent metallographic samples for carbonyl iron particles distributions and particle chain structures investigation.

Finite Element Modeling and Analysis of Magnetorheological Dampers

2011 ◽  
Author(s):  
David Case ◽  
Behzad Taheri ◽  
Edmond Richer
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Magnetic Flux ◽  
Weight Ratio ◽  
Magnetorheological Damper ◽  
Plastic Behavior ◽  
Magnetorheological Dampers ◽  
Flux Lines ◽  
Finite Element Software ◽  
Magnetic Flux Lines

A magnetorheological fluid consists of a suspension of microscopic magnetizable particles in a non-magnetic carrier medium. In the absence of a magnetic field, the fluid behaves in a roughly Newtonian manner. When a magnetic field is produced in the same space, the microscopic particles suspended in the fluid become oriented and form chains along the magnetic flux lines, changing the fluid’s rheology. The orientation of these particle chains is crucial to producing the Bingham plastic behavior necessary for high strength-to-weight ratio magnetorheological dampers and actuators. This project uses COMSOL Multiphysics finite element software to examine the magnetic flux lines, field intensity, and non-Newtonian fluid flow within a magnetorheological damper. Several established and novel damper configurations are examined and modified to improve performance while minimizing power draw of the electromagnet.

Application of Alternating Rotating Magnetic Field to Electromagnetic Barrel Finishing

2012 ◽  
Vol 723 ◽  
pp. 466-470
Author(s):  
Z.Q. Liu ◽  
Y. Chen ◽  
J. Teng
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Rotating Magnetic Field ◽  
Magnetic Flux Density ◽  
Distribution Law ◽  
Flux Lines ◽  
Magnetic Flux Lines ◽  
Working Principle ◽  
Barrel Finishing ◽  
The Magnetic Field

The working principle of the electromagnetic barrel finishing machine as well as the generating mechanism and effect of the alternating rotating magnetic field are analyzed, based on the electromagnetic theory to establish a mathematical model of the rotating magnetic field, by the ANSYS finite-element method, resolved the effect of the magnetic flux density and magnetic field strength impacted on the grinding pressure, the electromagnetic finishing machine internal magnetic flux lines distribution law is analyzed under the influence of the alternating rotating magnetic field, finally the reasonableness of the magnetic field distribution is verified by experiments and the electromagnetic finishing machine has been optimized.

scholarly journals Effect of Aerosil and Oleic Acid on Sedimentation of Magnetorheological Fluid

2019 ◽  
Vol 8 (12S2) ◽  
pp. 79-83
Keyword(s):  
Magnetic Field ◽  
Oleic Acid ◽  
Magnetic Force ◽  
Particle Concentration ◽  
Nano Particles ◽  
Carrier Fluid ◽  
Flux Lines ◽  
Smart Fluids ◽  
Magnetic Flux Lines ◽  
Ferro Magnetic

Magnetorheological Fluids (MRFs) are considered as smart fluids because they control viscosity using external magnetic field. It contains ferro-magnetic powder which are aligned in magnetic flux lines. The magnetic force between particles are controlled by magnetic field intensity. This controllable viscosity makes them acceptable in many mechanical applications, but due to difference in density between suspended particles and carrier fluid sedimentation is bound to occur. This thus creates the need of some additives. In our study, silica Nano particles (commercially known as Aerosil 200) is used as stabilizer and Oleic Acid is used as surfactant and their effect on sedimentation is studied in this article. Some other synthesis parameters like particle concentration, stirring duration and material loading also cause some change in sedimentation rate.

scholarly journals Improved interactive visualization of magnetic flux lines in 3-D space using edge finite elements

1996 ◽  
Vol 32 (3) ◽  
pp. 1477-1480 ◽  
Author(s):  
V. Cingoski ◽  
T. Kuribayashi ◽  
K. Kaneda ◽  
H. Yamashita
Keyword(s):  
Finite Elements ◽  
Magnetic Flux ◽  
Interactive Visualization ◽  
Flux Lines ◽  
Magnetic Flux Lines

Imaging magnetic flux lines with iron oxide nanoparticles using a “fossilized liquid assembly”

Soft Matter ◽  
2011 ◽  
Vol 7 (12) ◽  
pp. 5756 ◽  
Author(s):  
Ryan Schmidt ◽  
Jason Benkoski ◽  
Kevin Cavicchi ◽  
Alamgir Karim
Keyword(s):  
Iron Oxide ◽  
Magnetic Flux ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Flux Lines ◽  
Magnetic Flux Lines
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