2022
DOI: 10.1088/1361-665x/ac411d
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Visualizing rheological mechanism of magnetorheological fluids

Abstract: In order to study the rheological properties of aqueous magnetorheological fluids (MRFs) from microscopic point of view, an experimental observation method based on the fluorescence confocal laser scanning microscope is proposed to clearly produce the chain shape of the magnetic particles. Firstly, the mathematical model of the magnetic particles is established in a magnetic field using the magnetic dipole theory, and the MRFs with different fraction volumes and different magnetic fields are investigated. Furt… Show more

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Cited by 15 publications
(10 citation statements)
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“…When using MR fluids with a high concentration of iron particles, not only the formation of simple single-row chains is observed, but also the formation of more complex structures, such as thicker chains and aggregations. Within this process, the chains tend to aggregate with each other and form longer and thicker columnar structures [3][4][5][6][7].…”
Section: Mrf At a Glancementioning
confidence: 99%
“…When using MR fluids with a high concentration of iron particles, not only the formation of simple single-row chains is observed, but also the formation of more complex structures, such as thicker chains and aggregations. Within this process, the chains tend to aggregate with each other and form longer and thicker columnar structures [3][4][5][6][7].…”
Section: Mrf At a Glancementioning
confidence: 99%
“…While under the action of the magnetic field, the particles have an obvious orientation trend along the direction of the magnetic field. 45,46 By changing the external magnetic field, the viscosity of the MR fluid can be adjusted freely.…”
Section: Geometric Model Of Bearing Lubricated With Mmentioning
confidence: 99%
“…When the journal is stationary, the journal and shaft tile at the bottom of the approximate contact, in between the boundary lubrication and mixed lubrication, the lubrication effect is poor. Under the action of the applied magnetic field, magnetic particles by the magnetic torque along the magnetic field direction into a chain, the magnetic fluid viscosity increases, the structure of the strength significantly increased, the oil film thickness increases, the lubricant film bearing capacity increases, and the journal is propped up with the shaft tile to form a larger distance, in a fluid lubrication state, with better lubrication effect [21][22][23]. See Table 1 for the magnetic fluid lubrication bearing friction vice structure basic parameters table . Appl.…”
Section: Structural Model Of a Magneto-hydrodynamic Lubricated Bearin...mentioning
confidence: 99%