棒状電磁石を用いた大気中での磁性流体液滴の能動磁気浮上

Translated title of the contribution: Actively controlled magneticlevitation of a ferrofluid droplet in mid-airusing a bar-shaped electromagnet

山口 宗一朗, 大路 貴久*, 飴井 賢治, 清田 恭平

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

 Ferrofluid is a magnetic functional fluid that flows in the direction of strong magnetic field. The authors tried non-contact levitation of a ferrofluid droplet in mid-air by controlling external magnetic field from a bar-shaped electromagnet. This paper describes the magnetic levitation system which consists of the electromagnet with a tapered tip, displacement sensor, and z-positioning stage with an oil-repellent film. This paper also reports on the procedure to establish non-contact levitation of the droplet. We evaluated the deformation and levitating behavior of the 15 mg droplet before and after the levitation start by using a high-speed camera. Finally, from the viewpoint of magnetic levitation technology, we experimentally derived the relationship between control current, mass of a droplet, and levitation gap.

Translated title of the contributionActively controlled magneticlevitation of a ferrofluid droplet in mid-airusing a bar-shaped electromagnet
Original languageJapanese
Pages (from-to)239-244
Number of pages6
JournalJournal of the Japan Society of Applied Electromagnetics and Mechanics
Volume28
Issue number3
DOIs
StatePublished - 2020

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