Spiral vortices traveling between two rotating defects in the Taylor-Couette system.
Spiral vortices traveling between two rotating defects in the Taylor-Couette system.
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泰勒-库埃特系统中两个旋转缺陷之间传播的螺旋涡流。
DOI：
10.1103/physreve.72.056311
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
A. Pinter
中科院分区：
文献类型：
--
作者：
C. Hoffmann;M. Lücke;A. Pinter
本文对泰勒-库埃特系统中具有逆旋转柱体的涡旋流动进行了数值计算。用有限差分法和伽辽金法的结合求解了完全的、时变的Navier-Stokes方程。模拟了半径比eta=0.5和不同高度的环隙。它们被不旋转的盖子封闭，在它们附近产生局部的埃克曼涡，并阻止螺旋涡的轴向相位传播。定量详细地阐述了旋转缺陷、调制Ekman涡和体内螺旋涡结构的存在性和时空特性。
Numerical calculations of vortex flows in Taylor-Couette systems with counter rotating cylinders are presented. The full, time-dependent Navier-Stokes equations are solved with a combination of a finite difference and a Galerkin method. Annular gaps of radius ratio eta=0.5 and of several heights are simulated. They are closed by nonrotating lids that produce localized Ekman vortices in their vicinity and that prevent axial phase propagation of spiral vortices. The existence and spatiotemporal properties of rotating defects, modulated Ekman vortices, and the spiral vortex structures in the bulk are elucidated in quantitative detail.