1532 ヘマタイト粒子からなる非希釈コロイド分散系の配向分布とレオロジー特性に関する研究 : せん断流の回転角速度ベクトル方向に磁場が作用する場合の平均場近似による解析(G05-3 複雑流体,G05 流体工学)

概要

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We have investigated mainly the influences of magnetic particle-particle interactions on orientational distributions and viscosity of a semi-dense dispersion, which is composed of rod-like particles with a magnetic moment magnetized normal to the particle axis. The results obtained here are summarized as follows. Under circumstances of a very strong magnetic interaction between particles, the magnetic moment is strongly restricted in the magnetic field direction, so that the particle has a tendency to incline in the flow direction with the magnetic moment pointing to the magnetic field direction. For a strong shear flow, a directional characteristic of rod-like particles is enhanced, and this leads to a more significant one-peak-type distribution of the orientational distribution function. Magnetic interactions between particles do not contribute to the viscosity because the mean-field vector has only a component along the magnetic field direction.
社団法人日本機械学会の論文
2007-09-07