Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Nonlinear dynamics and pattern formation

DY 33.4: Vortrag

Freitag, 30. März 2007, 12:45–13:00, H3

Controlling the stability transfer between oppositely traveling waves and standing waves by inversion symmetry breaking perturbations — •Alexander Pinter, Manfred Lücke, and Christian Hoffmann — Institut für Theoretische Physik, Universität des Saarlandes, Postfach 15 11 50, D-66041 Saarbrücken

The effect of an externally applied flow on symmetry degenerated waves propagating into opposite directions and standing waves that exchange stability with the traveling waves via mixed states is analyzed. Wave structures that consist of spiral vortices in the counter rotating Taylor-Couette system are investigated by full numerical simulations and explained quantitatively by amplitude equations containing quintic coupling terms. The latter are appropriate to describe the influence of inversion symmetry breaking perturbations on many oscillatory instabilities with O(2) symmetry.