1501 回転 2 重円柱間流れモード情報に対する力学的揺らぎの影響  [in Japanese] Effect of Dynamic Disturbances on Mode Information of Flows between Two Rotating Cylinders  [in Japanese]

One of the typical nonlinear phenomena is Taylor-Couette flow developing between two concentric cylinders with finite length. The outer cylinder and the upper and lower end walls of the cylinders are stationary. The inner cylinder accelerates linearly from rest to constant Reynolds number. The flow also exhibits some probabilistic characteristics that may be due to generic nature of chaos, imperfections of experimental apparatus and dispersions of conditions. One of sources of imperfections is the velocity fluctuation in an initial fluid state. In this study, the relation between fluctuations in the initial state and modes of flow patterns is considered. The effect of quasi-isotropic initial flows with various intensities on the final modes of flows that start from rest and accelerate gradually is investigated numerically.