Anomalous Orientation of Dipolar Particle in Shear and Magnetic Field(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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概要

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• We found, by numerical simulation, an anomalous behavior in the average magnetic moment of a dilute suspension of magnetic particles of elongated shape under shear flow. In a shear flow υ=γye_x, (e_x being the unit vector in x direction), upon the application of the magnetic field in y direction, magnetic moment first appears in x direction. The magnetic moment starts to orient towards y direction after the magnetic field exceeds a certain critical value. This phenomena is caused by the competition of the shear flow and the magnetic moment, and is seen when the effect of Brownian motion is negligible. When the Brownian motion is present, the anomaly becomes less obvious, but can be seen for high Peclet number. An analytical theory is given to explain the behavior.

• 社団法人日本物理学会の論文
• 2006-06-15

著者

• Makino Masato

  Japan Science And Technology Agency Crest Department Of Applied Physics University Of Tokyo

• Doi Masao

  Department Of Applied Physics Faculty Of Engineering Nagoya University

• KODA Hideaki

  Department of Computational Science and Engineering, School of Engineering, Nagoya University

• Koda Hideaki

  Department Of Computational Science And Engineering School Of Engineering Nagoya University

• Doi Masao

  Department of Applied Physics, University of Tokyo

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