Swimming of magnetic micro-machines under a very wide-range of Reynolds number conditions

Kazushi Ishiyama; Masahiko Sendoh; Aya Yamazaki; Mitsuteru Inoue; Ken Ichi Arai

doi:10.1109/20.951331

Swimming of magnetic micro-machines under a very wide-range of Reynolds number conditions

Kazushi Ishiyama, Masahiko Sendoh, Aya Yamazaki, Mitsuteru Inoue, Ken Ichi Arai

RIEC - Human and Bio Information Systems Division

Research output: Contribution to journal › Conference article › peer-review

25 Citations (Scopus)

Abstract

A magnetic micro-machine, a minuscule device composed of a cylindrical body with a magnet and spiral blade, swims in liquid under the force of a rotational magnetic field. To obtain a machine capable of swimming through organs and blood vessels for medical applications, it must be designed on a scale below the mm order and retain its swimming capability under highly varied conditions. The swimming properties of a spiral-type magnetic micromachine were examined under various Reynolds number conditions by altering the kinematic viscosity of the liquid. The machine could swim in liquids with kinematic viscosities ranging from 1.37 to 5 × 10⁵ mm²/s, which translates into a Reynolds number from 430 to 6 × 10^-τ. The Reynolds number of blood flow is within this range. In addition, the load torque for swimming was studied theoretically and experimentally. The results obtained suggested great promise for the development or a micro-machine that can be put to work inside the human body.

Original language	English
Pages (from-to)	2868-2870
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.951331
Publication status	Published - 2001 Jul
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11

Keywords

Magnetic micro-machine
Magnetic torque
Reynolds number
Swimming

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10.1109/20.951331

Cite this

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title = "Swimming of magnetic micro-machines under a very wide-range of Reynolds number conditions",

abstract = "A magnetic micro-machine, a minuscule device composed of a cylindrical body with a magnet and spiral blade, swims in liquid under the force of a rotational magnetic field. To obtain a machine capable of swimming through organs and blood vessels for medical applications, it must be designed on a scale below the mm order and retain its swimming capability under highly varied conditions. The swimming properties of a spiral-type magnetic micromachine were examined under various Reynolds number conditions by altering the kinematic viscosity of the liquid. The machine could swim in liquids with kinematic viscosities ranging from 1.37 to 5 × 105 mm2/s, which translates into a Reynolds number from 430 to 6 × 10-τ. The Reynolds number of blood flow is within this range. In addition, the load torque for swimming was studied theoretically and experimentally. The results obtained suggested great promise for the development or a micro-machine that can be put to work inside the human body.",

keywords = "Magnetic micro-machine, Magnetic torque, Reynolds number, Swimming",

author = "Kazushi Ishiyama and Masahiko Sendoh and Aya Yamazaki and Mitsuteru Inoue and Arai, {Ken Ichi}",

note = "Funding Information: Manuscript received October 13, 2000. This work was supported in part by the Promotion of Fundamental Studies in Health Science of the Organization for Pharmaceutical Safety and Research of Japan. K. Ishiyama, M. Sendoh, A. Yamazaki, and K. I. Arai are with the Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan (e-mail: {ishiyama; sendoh; aya; arai}@riec.tohoku.ac.jp). M. Inoue is with the Toyohashi University of Technology, 1-1 Hibarigaoka Tenpaku-cho, Toyohashi 441-8580, Japan (e-mail: inouem@eee.tut.ac.jp). Publisher Item Identifier S 0018-9464(01)07099-6.; 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

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AU - Ishiyama, Kazushi

AU - Sendoh, Masahiko

AU - Yamazaki, Aya

AU - Inoue, Mitsuteru

AU - Arai, Ken Ichi

N1 - Funding Information: Manuscript received October 13, 2000. This work was supported in part by the Promotion of Fundamental Studies in Health Science of the Organization for Pharmaceutical Safety and Research of Japan. K. Ishiyama, M. Sendoh, A. Yamazaki, and K. I. Arai are with the Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan (e-mail: {ishiyama; sendoh; aya; arai}@riec.tohoku.ac.jp). M. Inoue is with the Toyohashi University of Technology, 1-1 Hibarigaoka Tenpaku-cho, Toyohashi 441-8580, Japan (e-mail: inouem@eee.tut.ac.jp). Publisher Item Identifier S 0018-9464(01)07099-6.

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N2 - A magnetic micro-machine, a minuscule device composed of a cylindrical body with a magnet and spiral blade, swims in liquid under the force of a rotational magnetic field. To obtain a machine capable of swimming through organs and blood vessels for medical applications, it must be designed on a scale below the mm order and retain its swimming capability under highly varied conditions. The swimming properties of a spiral-type magnetic micromachine were examined under various Reynolds number conditions by altering the kinematic viscosity of the liquid. The machine could swim in liquids with kinematic viscosities ranging from 1.37 to 5 × 105 mm2/s, which translates into a Reynolds number from 430 to 6 × 10-τ. The Reynolds number of blood flow is within this range. In addition, the load torque for swimming was studied theoretically and experimentally. The results obtained suggested great promise for the development or a micro-machine that can be put to work inside the human body.

AB - A magnetic micro-machine, a minuscule device composed of a cylindrical body with a magnet and spiral blade, swims in liquid under the force of a rotational magnetic field. To obtain a machine capable of swimming through organs and blood vessels for medical applications, it must be designed on a scale below the mm order and retain its swimming capability under highly varied conditions. The swimming properties of a spiral-type magnetic micromachine were examined under various Reynolds number conditions by altering the kinematic viscosity of the liquid. The machine could swim in liquids with kinematic viscosities ranging from 1.37 to 5 × 105 mm2/s, which translates into a Reynolds number from 430 to 6 × 10-τ. The Reynolds number of blood flow is within this range. In addition, the load torque for swimming was studied theoretically and experimentally. The results obtained suggested great promise for the development or a micro-machine that can be put to work inside the human body.

KW - Magnetic micro-machine

KW - Magnetic torque

KW - Reynolds number

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Y2 - 7 January 2001 through 11 January 2001

ER -

Swimming of magnetic micro-machines under a very wide-range of Reynolds number conditions

Abstract

Keywords

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