Streaming flows produced by oscillating interface of magnetic fluid adsorbed on a permanent magnet in alternating magnetic field

[摘要] This paper describes microstreaming flows generated by oscillating interface of magnetic fluid adsorbed on a circular cylindrical permanent magnet in alternating magnetic field. The interface of magnetic fluid adsorbed on the NdFeB magnet responds to the external alternating magnetic flied as harmonic oscillation. The directions of alternating magnetic field are parallel and antiparallel to the magnetic field of permanent magnet. The oscillation of magnetic fluid interface generates streaming flow around the magnet-magnetic fluid element in water. Microstreaming flows are observed with a high-speed video camera analysis system. The flow pattern generated by magnetic fluid motion depends on the Keulegan-Carpenter number and the Reynolds number.

[发布机构] Department of Machine Intelligence and Systems Engineering, Akita Prefectural University, Yurihonjo, Akita, Japan^1;Graduate School of Systems Science and Technology, Akita Prefectural University, Yurihonjo, Akita, Japan^2

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Alternating magnetic field;Analysis system;Fluid interface;Harmonic oscillation;High speed video cameras;Keulegan-carpenter number;Nd-Fe-B magnets;Streaming flow