Spiral vortices traveling between two rotating defects in the Taylor-Couette system

Details Spiral vortices traveling between two rotating defects in the Taylor-Couette system Spiral vortices traveling between two rotating defects in the Taylor-Couette system

2005-05-20

arxiv.org/abs/physics/0505141v3

Phys. Rev. E 72, 056311 (2005).

Physics

Fluid Dynamics

9 pages, 9 figures

Scientific paper

10.1103/PhysRevE.72.056311

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. Existence and spatio temporal properties of rotating defects, of modulated Ekman vortices, and of the spiral vortex structures in the bulk are elucidated in quantitative detail.

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