2020
Volume 20, Number 4, pp. 137-142
Simple method for micro flow generation using magnetic fluid and a small cubic permanent magnet
S. Sudo and M. Ito
Faculty of Systems Science and Technology, Akita Prefectural University, Yurihonjo, Japan
This paper proposes a simple method to generate aqueous micro flows. The method is a wireless energy supply system composed of a magnetic fluid and a cubic permanent magnet. The magnet-magnetic fluid element was submerged in water. Immiscible magnetic fluid was adsorbed on the small cubic permanent magnet in the water. The system was driven by the external alternating magnetic field created by the coil. The magnetic fluid interface responded to the alternating magnetic field with a harmonic oscillation. The interfacial oscillation of the magnetic fluid adsorbed on the magnet generated micro water flows, which generation was confirmed by a visualization technique. The details of micro water flow and magnetic fluid interface response to the alternating magnetic field were revealed experimentally.
Keywords: interface oscillation, magnetic fields, magnetic fluids