Chaotic advection and relative dispersion in a convective flow

Details Chaotic advection and relative dispersion in a convective flow Chaotic advection and relative dispersion in a convective flow

1999-08-02

arxiv.org/abs/chao-dyn/9908008v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 3 ps figures, submitted to Europhysics Letters

Scientific paper

10.1063/1.1320836

Lagrangian chaos is experimentally investigated in a convective flow by means of Particle Tracking Velocimetry. The Finite Size Lyapunov Exponent analysis is applied to quantify dispersion properties at different scales. In the range of parameters of the experiment, Lagrangian motion is found to be chaotic. Moreover, the Lyapunov depends on the Rayleigh number as Ra^(1/2). A simple dimensional argument for explaining the observed power law scaling is proposed.

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