Regensburg 2004 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.25: Poster

Donnerstag, 11. März 2004, 16:00–18:00, Poster D

Lyapunov Instabilities in Lennard-Jones Fluids — •Hongliu Yang and Günter Radons — Institut für Physik, Theoretische Physik I, Technische Universität Chemnitz, D-09107 Chemnitz

We present new results on Lyapunov spectra and Lyapunov vectors for Lennard-Jones fluids. The density and temperature dependence of these quantities is discussed in detail. The spatio-temporal behavior of the hydrodynamic Lyapunov modes is obtained by studying its dependence on the Lyapunov exponent, frequency and wave number. In contrast to this wave-like behavior, the Lyapunov vectors for large Lyapunov exponents show localized behavior in phase space, as is seen by evaluating the corresponding participation ratios.