The dynamic behaviour of a micro liquid bridge of magnetic fluid in static and alternating magnetic fields

Issue title: Proceedings from the 16th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2013)

Guest editors: Xavier Maldague and Toshiyuki Takagi

Article type: Research Article

Authors: Sudo, Seiichi^{a; *} | Takamatsu, Hiroki^a | Yano, Tetsuya^a | Takana, Hidemasa^b | Nishiyama, Hideya^b

Affiliations: [a] Department of Machine Intelligence and Systems Engineering, Akita Prefectural University, Yurihonjo, Akita, Japan | [b] Institute of Fluid Science, Tohoku University, Sendai, Miyagi, Japan | Université Laval, Canada | Tohoku University, Japan

Correspondence: [*] Corresponding author: Seiichi Sudo, Department of Machine Intelligence and Systems Engineering, Akita Prefectural University, Ebinokuchi 84-4, Yurihonjo, Akita 015 0055, Japan. Tel.: +81 184 27 2111; Fax: +81 184 27 2188; E-mail: [email protected]

Abstract: Experimental study on the dynamic behaviour of magnetic fluid micro bridges under the effect of static and alternating magnetic fields was conducted using a high-speed video camera system. Two needle-shaped NdFeB permanent magnets were used to generate the static magnetic field, and Helmholtz coil was used to generate alternating field. Harmonic motion of magnetic fluid bridge was observed. It was found that the amplitude in the vibration of magnetic fluid bridge depends on the strength of alternating magnetic field at the constant frequency. Phenomena of filament thinning and breakup in a capillary bridge of magnetic fluid under the alternating magnetic fields were revealed.

Keywords: Magnetic fluids, liquid bridge, permanent magnet, alternating magnetic field

DOI: 10.3233/JAE-141813

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 45, no. 1-4, pp. 61-67, 2014