Experimental Study on Sealing Performance and Flow Characteristics of Magnetic Fluid in Extremely Tiny Clearance under Magnetic Field
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Published
Sep 28, 2023
Keywords
Magnetic Fluid, viscosity, nanoparticles.
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M. Motozawa
Faculty of Engineering, Shizuoka University, Shizuoka, Japan
Y. Kato
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan
W. Rakpakdee
Faculty of Engineering, Shizuoka University, Shizuoka, Japan
M. Fukuta
Faculty of Engineering, Shizuoka University, Shizuoka, Japan
Abstract
Sealing performance and flow characteristics of magnetic fluid in extremely tiny clearance less than 10 μm under magnetic field are investigated experimentally. The clearance in the test section is set to 15, 20, 30 and 50 μm in addition to the extremely tiny clearances of 5 and 10 μm, and magnetic field is applied to magnetic fluid flow at the clearance. The results show that 1.2 MPa of maximum pressure resistance was obtained at 5 μm of extremely tiny clearance from the pressure resistance test for high viscosity magnetic fluid, and the relationship among frictional coefficient, magnetic field and Re is quite different among 5, 20 and 50 μm of tiny clearance from the flow characteristic test.