1415 格子ボルツマン法による管路内流れにおける粘弾性皮膜固体の変形解析(OS14-3 分散系混相流のダイナミクス,オーガナイズドセッション)

概要

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The lattice Boltzmann method with an elastic model is applied to the simulation of two-phase flows containing deformable bodies with viscoelastic membranes. In the model, not only shear deformation of the membrane but also change in the total volume and the total surface area of the membrane are considered. In addition, the present method enables us to give different viscosity of the fluid inside the membrane from that of the fluid outside the membrane. By using the method, the deformation of a body under shear flows is simulated to investigate the effect of the viscosity ratio of the fluids. It is found that the deformability of the body decreases with relative increase in the viscosity of the interior fluid. Also, the behavior of two biconcave bodies in a square pipe flow is simulated. It is seen that circular flows appear in the gap between the bodies.
2009-11-06