Change of ultrasonic propagation velocity in an MR fluid under AC magnetic fields

Takashi Fukumoto, Yuya Tanaka, Tatsuo Sawada

Research output: Contribution to journalArticle


This paper reports the experimental studies on a magneto-rheological (MR) fluid under AC magnetic fields. Magnetic clusters in the MR fluid are formed along the magnetic fields. The ultrasonic propagation velocity changes owing to the presence of clustering structures in the MR fluid. We investigated clustering structures by measuring this change in the ultrasonic propagation velocity. The results indicate that magnetic clusters in the MR fluid depend on the elapsed time, intensity, frequency, and angle of the AC magnetic fields.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalInternational Journal of Applied Electromagnetics and Mechanics
Issue number1
Publication statusPublished - 2019 Jan 1



  • AC magnetic field
  • anisotropy
  • Magnetic fluid
  • ultrasonic wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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