B-221 回転平板間流の絶対過度ゼロ状態

概要

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Time evolutions of vortical structures in the incompressible viscous fluid between rotating parallel plates are investigated numerically for both Couette and Poiseuille flow types. Numerical simulations are performed by use of the truncation model obtained by applying the Chebyshev polynomial expansion for the vertical direction to plates and the Fourier series expansion for the parallel directions to plates. For rotating shear flows, it is well known that distinctive vortical structures appear in the zero-absolute-vorticity-state. Our purpose of this study is to investigate the relation between the zero-absolute-vorticity-state and the coherent vortical structure in the rotating shear flow. In this study, we find that the rotating shear flow approaches the zero-absolute-vorticity state only if the vortical structure is three dimentional, and then characteristic vortical structures are observed.
日本流体力学会の論文
2003-07-28