柔軟な固体と流体の相互作用問題に対する数値計算法の研究(数値計算(1),一般講演)

概要

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An effective computational method for interaction between multiple flexible solids and a fluid is proposed. The fluid phase is solved by Immersed Boundary Method (IBM) of body-force type. Deformation of objects is computed by incorporating fluid-solid interaction force of the IBM in external force vector of Finite Element Method (FEM). First, two-dimensionally, this method is validated by flow-induced vibration of a beam problem. Then, the applicability of the present method is shown by direct numerical simulation of flow fields including multiple deformable particles, the influences of particle properties are investigated. We demonstrated that the non-circularity and deformable feature caused the difference not only in settling behavior of each particles but also in the collective dynamics of two-phase flow field due to the interaction between particles through fluid phase. In addition, examples of the three-dimensional application are demonstrated.
2010-09-09