抄録
A micro-macro approach for numerical simulation of concentrated dispersion system of oblate particles was investigated. In the present approach, the computation of macro flows was coupled with the micro simulation of dynamics of dispersed particles. Oblate particles were modeled by oblate spheroids, and the interaction between particles was expressed by a Maier-Saupe type mean field potential. The motion of each particle was described by a stochastic differential equation. The Brownian configuration method was used and the orientation of particles was described as a configuration field. The time evolution of the configuration field was solved using a finite element method. In addition, both the velocity and the pressure field were solved using a finite element method. Simple shear flows and flows between parallel plates were numerically simulated to investigate the applicability of the present approach to the simulation of concentrated dispersion system of oblate particles. The computational results indicated that the present approach was able to qualitatively simulate the behavior of concentrated dispersion systems of oblate particles, such as a flat velocity profile and the flow-induced orientation of particles, and that the micro-macro simulation was available at a realistic computational cost.
