Abstract
Lagrangian dynamics of turbulent Rayleigh-B\'enard convection is studied experimentally with 3D particle tracking velocimetry at various aspect ratios $G$. Insight on the pair dispersion, conditional acceleration probability density functions, and roll dynamics induced by $G$ was found from nearly $3.5\ifmmode\times\else\texttimes\fi{}{10}^{7}$ events.
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