三次元流れ場中にある強磁性棒状粒子からなる非希釈コロイド分散系の粒子間相互作用がレオロジー特性に及ぼす影響(流体工学,流体機械)

概要

論文の詳細を見る
The rheological properties of a nondilute colloidal dispersion, which is composed of the ferromagnetic spherocylinder particles influenced by the external magnetic field, have been analyzed. In order to understand the effects of the magnetic interactions between the particles, we have derived the viscosity induced by the external magnetic field, by applying the orientational distributions of the particles in steady three dimensional flow by using the mean-field theory and the perturbation expansion method. The viscosity is mainly described by the simple fractional functions of the magnetic field. The coefficients of the fractional functions make a classification of the behaviors of the viscosity. We have found the condition to generate the appropriate viscosity by the magnetic field. Compared with a dilute system, in the nondilute system, the existence of the particle-particle interactions provides the swift response of the viscosity to the external magnetic field. The influence of the magnetic interaction on the viscosity decreases with the larger aspect ratio of the particle.
社団法人日本機械学会の論文
2008-02-25