Effect of External Magnetic Field on Ultrasonic Propagation Velocity in Magnetic Fluids

• MOTOZAWA Masaaki

  Department of Mechanical Engineering, Keio University

• MATSUMOTO Yoshiyuki

  Department of Mechanical Engineering, Keio University

• SAWADA Tatsuo

  Department of Mechanical Engineering, Keio University

抄録

Experimental results for the properties of ultrasonic propagation velocity in kerosene-based and water-based magnetic fluids are reported. Ultrasonic wave frequencies of 1MHz, 2MHz and 4MHz are used and the measurement scheme is based on the pulse method. The external magnetic field intensity is varied from 0mT to 550mT and the angle between the magnetic field direction and the direction of ultrasonic wave propagation is varied from 0° to 90°. The ultrasonic propagation velocity in magnetic fluids is dependent on temperature, elapsed time of applying the magnetic field, and magnetic field intensity. Hysteresis and anisotropy of ultrasonic propagation velocity are observed. These interesting results seem to be related to chain-like cluster formation in the magnetic fluids and the characteristic period of Brownian motion of the magnetic particles.

収録刊行物

• JSME International Journal Series B Fluids and Thermal Engineering

  JSME International Journal Series B Fluids and Thermal Engineering 48 (3), 471-477, 2005

  一般社団法人 日本機械学会

キーワード

• Magnetic Fluid
• Sound Velocity
• Ultrasonic Propagation Velocity
• Anisotropy
• Chain-Like Cluster
• Hysteresis

詳細情報

• CRID: 1390001204676518912
• NII論文ID: 110004820207
• NII書誌ID: AA10888815
• DOI: 10.1299/jsmeb.48.471
• ISSN: 13475371
• ISSN: 13408054
• NDL書誌ID: 7387165
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7387165
• Web Site: http://www.jstage.jst.go.jp/article/jsmeb/48/3/48_3_471/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可