単純せん断流中での強磁性コロイド分散系の挙動に関するブラウン動力学シミュレーション〔流体工学, 流体機械〕

概要

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We have carried out Brownian dynamics simulations to investigate the behavior of the clusters of ferromagnetic particles in a colloidal dispersion subjected to a simple shear flow. The results have been compared with those of Stokesian dynamics and Monte Carlo simulations. The main results obtained here are summarized as follows. The Brownian dynamics method can capture thick chainlike clusters formed along a magnetic field direction as well as the Stokesian dynamics and the Monte Carlo methods. However, Brownian motions of the particles give a subtle influence on the internal structure of the thick chainlike clusters even under the situation that magnetic particle-particle interactions dominate the particle Brownian motion. The Stokesian dynamics method misleads to physically unreasonable cluster formation for the case that the particle Brownian motions play an important role compared with the magnetic particle-particle interactions.
社団法人日本機械学会の論文
1998-04-25