2016/10/31 by Alexei A. Mailybaev · 2 citations
Physics and Astronomy · #physics.flu-dyn
paper · pdf · doi:10.1088/1361-6544/aa6eb5
published as Nonlinearity 30 (2017), 2466-2484 · 22 pages
arxiv created 2017/05/14 · arxiv updated 2017/05/16
In this work we suggest that a turbulent phase of the Rayleigh-Taylor instability can be explained as a universal stochastic wave traveling with constant speed in a properly renormalized system. This wave, originating from ordinary deterministic chaos in a renormalized time, has two constant limiting states at both sides. These states are related to the initial discontinuity at large scales and to stationary turbulence at small scales. The theoretical analysis is confirmed with extensive numerical simulations made for a new shell model, which features basic properties of the phenomenological theory for the Rayleigh-Taylor instability.