埋め込み境界法を用いた移動物体問題における内部流れの影響(数値計算(1),一般講演)

概要

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We report an effect of internal flow which is generally induced inside a body in the simulation of a moving body by the immersed boundary method. The internal flow affects the force and torque acting on the body. In this study, three schemes for approximating the internal flow effect are introduced; no internal flow effect, rigid body approximation, and Lagrangian points approximation. By comparing the above three schemes through the simulations of a moving body, we examine the magnitude of the internal flow effect. The simulations of the flow around an oscillating circular cylinder and of the sedimentations of an elliptical cylinder and a sphere are performed by an immersed boundary-lattice Boltzmann method, and it is found that the internal flow effect is signficant for unsteady body motions and grows as the Reynolds number increases.
日本流体力学会の論文
2010-09-09