Dresden 2006 – wissenschaftliches Programm

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SYSS: Structure Formation and Self-Organization in non-equilibrium Systems

SYSS 3: Structure Formation and Self-Organization in non-equilibrium Systems - Poster

SYSS 3.15: Poster

Donnerstag, 30. März 2006, 16:00–18:00, P1

Spiral vortices traveling between two rotating defects in the Taylor-Couette system — •Christian Hoffmann — Institut für Theoretische Physik, Universität des Saarlandes, 66123 Saarbrücken

We present numerical calculations of vortex flows in Taylor-Couette systems with counter-rotating cylinders. The full, time dependent Navier-Stokes equations are solved with a combination of a finite difference and a Galerkin method. Systems of several cylinder lengths are simulated. They are closed by nonrotating lids. These rigid ends 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 presented in quantitative detail.