1214 非慣性系座標をもちいた任意形状物体の非定常落下の解析(OS-3 分散相・連続相流れの相互作用問題(2))

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In this work, we simulated flow fields around a falling rigid body in a non-inertial frame of reference. Unsteady movements of translation and rotation were allowed to the object. The effect of the movements were incorporated into the Navier-Stokes equations as apperant forces together with the effect of the frame transformation. The flow fields were analysed by a direct numerical simulation of the N-S equations. To maintain the orthogonality of the rotation matrix in the time advancement, a new method with quarternion was proposed. In the present work, an appropriate boundary conditions for the fluid were also proposed. The present method was confirmed to reproduce reasonable flow fields around a hollow-shaped object.
社団法人日本機械学会の論文
2004-03-17