Rapid shear flow of a dry magnetic powder in an externally applied magnetic field: An experimental study

1987 ◽  
Vol 30 (7) ◽  
pp. 1993 ◽  
Author(s):  
Kevin Craig ◽  
R. H. Buckholz ◽  
G. Domoto
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Shear Flow ◽  
Applied Magnetic Field ◽  
Magnetic Powder

scholarly journals Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1870
Author(s):  
Dmitry Borin ◽  
Robert Müller ◽  
Stefan Odenbach
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Magnetic Nanoparticles ◽  
External Magnetic Field ◽  
Shear Flow ◽  
Magnetic Fluid ◽  
Barium Hexaferrite ◽  
Dipole Interaction ◽  
Field Dependent ◽  
Fluid Behaviour

This paper presents the results of an experimental study of the influence of an external magnetic field on the shear flow behaviour of a magnetic fluid based on barium hexaferrite nanoplates. With the use of rheometry, the magnetoviscosity and field-dependent yield-stress in the fluid are evaluated. The observed fluid behaviour is compared to that of ferrofluids with magnetic nanoparticles having high dipole interaction. The results obtained supplement the so-far poorly studied topic of the influence of magnetic nanoparticles’ shape on magnetoviscous effects. It is concluded that the parameter determining the observed magnetoviscous effects in the fluid under study is the ratio V2/l3, where V is the volume of the nanoparticle and l is the size of the nanoparticle in the direction corresponding to its orientation in the externally applied magnetic field.

Orientational Distributions of a Ferromagnetic Spherocylinder Particle in a Simple Shear Flow

2002 ◽  
Author(s):  
Masayuki Aoshima ◽  
Akira Satoh ◽  
Geoff N. Coverdale ◽  
Roy W. Chantrell
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Shear Flow ◽  
Flow Field ◽  
Simple Shear ◽  
Applied Magnetic Field ◽  
Spherical Particles ◽  
Simple Shear Flow ◽  
Microstructure Formation ◽  
Base Liquid

A ferrofluid is a suspension of ferromagnetic spherical particles in a base liquid (1), and is well known as a functional fluid which responds to an external magnetic field to give a large increase in the viscosity. Such a significant increase in the viscosity is due to the fact that chain-like clusters are formed owing to magnetostatic interactions between particles in an applied magnetic field. The microstructure formation offers a large resistance to a flow field that gives rise to a significant increase of the apparent viscosity (2).

scholarly journals Flow of Magnetic Powder in Stepped Cavity Shape under Applied Magnetic Field

2005 ◽  
Vol 52 (6) ◽  
pp. 458-463 ◽  
Author(s):  
Fujio Tsumori ◽  
Fumikazu Kurihara ◽  
Hidetoshi Kotera ◽  
Susumu Shima
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Magnetic Powder ◽  
Cavity Shape

Changes in the Resistance Force of a Magneto-Rheological Shock Absorber Induced by a Magnetic Field

2018 ◽  
Vol 915 ◽  
pp. 39-44
Author(s):  
Tatsuo Sawada ◽  
Takuma Endo ◽  
Yuzo Shimizu ◽  
Hitoshi Nishida
Keyword(s):  
Magnetic Field ◽  
Fluid Flow ◽  
Shear Flow ◽  
Applied Magnetic Field ◽  
Shock Absorber ◽  
Plug Flow ◽  
Resistance Force ◽  
Mr Fluid ◽  
Bingham Plastic ◽  
Magneto Rheological

In this study, we report the theoretical resistance force of a magneto-rheological (MR) shock absorber. We use the Bingham plastic model to theoretically represent the dynamic behavior of MR fluid flow in a circular pipe under the effect of a magnetic field. Because an MR fluid has yield stresses, the flow is divided into two regions: shear flow and plug flow. We reveal the relation between the resistance force of the MR shock absorber and the applied magnetic field. We conduct experiments and compare the experimental and analytical results to verify the theoretical approach.

scholarly journals Experimental study on the effect of applied magnetic field on plane wave attenuation by microwave plasma plume

2009 ◽  
Vol 58 (7) ◽  
pp. 4793
Author(s):  
Yang Juan ◽  
Long Chun-Wei ◽  
Chen Mao-Lin ◽  
Xu Ying-Qiao ◽  
Tan Xiao-Qun
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Plane Wave ◽  
Applied Magnetic Field ◽  
Plasma Plume ◽  
Microwave Plasma ◽  
Wave Attenuation
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