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Particle Transport in Weakly Turbulent Rayleigh-Benard Convection

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We present data from a numerical study of two-particle dispersion of passive tracers in the weakly turbulent state of Spiral Defect Chaos in Rayleigh-Bénard convection. In a Lagrangian frame of reference, we investigate the competition between molecular diffusion and advection. We consider high aspect ratio systems (width/height ≥ 102) and focus on the tracer dispersion in the horizontal plane.

Author(s):

Simon Schütz    
Max Planck Institute for Dynamics and Self-Organization
Germany

Eberhard Bodenschatz    
Max Planck Institute for Dynamics and Self-Organization
Germany