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Publication 14-CNA-017
Gautam Iyer Alexei Novikov Abstract: It is well known that on long time scales the behaviour of tracer particles diffusing in a cellular flow is effectively that of a Brownian motion.
This paper studies the behaviour on "intermediate" time scales before diffusion sets in. Various heuristics suggest that an anomalous diffusive behaviour should be observed. We prove that the variance on intermediate time scales
grows like $O(\sqrt t)$. Hence, on these time scales the effective behaviour can not be purely diffusive, and is consistent with an anomalous diffusive behaviour.Get the paper in its entirety as 14-CNA-017.pdf |