Evolution of multimode rayleigh-taylor instability towards self-similar turbulent mixing

S. Atzeni, A. Guerrieri

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Abstract

The evolution of the multimode Rayleigh-Taylor instability of nearly incompressible fluids, with density ratio r = 2, is investigated by means of two-dimensional hydrodynamic simulations. The study focuses on the effect of the initial perturbation on the evolution towards turbulent mixing. It is shown that, for sufficiently large times, a self-similar mixing regime occurs, in which typical spatial scales (such as the size of the mixed layer) evolve proportionally to g(t - t0f, where g is the gravity, t the time, and i0 is a characteristic time depending on the initial conditions. A model for the prediction of t0 is then presented, which is in agreement with the simulations. © 1993 IOP Pubilishing Ltd.
Original languageEnglish
Pages (from-to)603 - 609
Number of pages7
JournalEurophysics Letters
Volume22
Issue number8
DOIs
Publication statusPublished - 10 Jun 1993
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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