Experimental evidence of chaotic advection in a convective flow

Details Experimental evidence of chaotic advection in a convective flow Experimental evidence of chaotic advection in a convective flow

2001-03-14

arxiv.org/abs/nlin/0103017v1

Europhys. Lett. vol. 48, pag. 629 (1999)

Nonlinear Sciences

Chaotic Dynamics

7 pages, 3 figure

Scientific paper

10.1209/epl/i1999-00530-3

Lagrangian chaos is experimentally investigated in a convective flow by means of Particle Tracking Velocimetry. The Fnite 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 ${\cal R}a^{1/2}$. A simple dimensional argument for explaining the observed power law scaling is proposed.

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