楕円粒子を含む懸濁液の実効粘度分布に関する数値解析

抄録

The rheology of a suspension would vary with motion and dispersion of the suspended particles. In this study, 2-dimensional numerical simulation of a suspension flow with rigid elliptical particles in a channel was conducted. The governing equation of fluid was the regularized lattice Boltzmann equation, and in order to describe curved boundary on a Cartesian grid, the virtual flux method was applied. As a result, the effective viscosity varies in time because of the rotational motions of the particles. In the case of weak confinement (particles are relatively small compared to the channel width), spatial variation of the effective viscosity was more dominant than the temporal one.