Anomalous diffusion in fast cellular flows at intermediate time scales

Gautam Iyer, Alexei Novikov

Research output: Contribution to journalArticle

5 Scopus citations

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 (Formula presented.). Hence, on these time scales the effective behaviour can not be purely diffusive, and is consistent with an anomalous diffusive behaviour.

Original languageEnglish (US)
Pages (from-to)707-740
Number of pages34
JournalProbability Theory and Related Fields
Volume164
Issue number3-4
DOIs
StatePublished - Apr 1 2016

All Science Journal Classification (ASJC) codes

  • Analysis
  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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