第２部門②

[2B07-12-01] Eulerian-Lagrangian Approach for Interactions between Fluids and Multiple Deformable Swelling Objects using Mass-Spring Model

*Niku Guinea¹, Daisuke Toriu², Satoru Ushijima² (1. Kyoto University, Graduate School of Engineering, 2. Kyoto University, ACCMS)

Keywords:Fluid-Solid Interaction, Deformable Object, Mass-Spring Model, Swelling Object, Immersed Boundary Method

A computation method was proposed for the interactions between Newtonian fluids and deformable solid objects which swell by absorbing the surrounding fluids. The direct-forcing immersed boundary method and mass-spring model are used to estimate the fluid-solid interactive forces and deformations of the solid. The swelling of the object is simulated by changing the natural lengths of the spring models. In addition, the solid-solid interaction is treated by utilizing the distinct element method. The proposed method was applied to three numerical experiments. As a result, it was shown that the basic behaviors of the swelling-deformable objects are reasonably calculated with the present method.