Defect turbulence and generalized statistical mechanics
arXiv:cond-mat/0302623 · doi:10.1016/j.physd.2004.01.033
Abstract
We present experimental evidence that the motion of point defects in thermal convection patterns in an inclined fluid layer is well-described by Tsallis statistics with an entropic index $q \approx 1.5$. The dynamical properties of the defects (anomalous diffusion, shape of velocity distributions, power law decay of correlations) are in good agreement with typical predictions of nonextensive models, over a range of driving parameters.