title: Effects of surface tension on immiscible Rayleigh-Taylor turbulence.
abstract: We present phenomenology describing the internal structure of a turbulent zone, produced as the result of the push of a heavy fluid into a light one, for the case of immiscible fluids. One finds that the Kolmogorov cascade is realized within a range that grows with time, viz., scales between the mixing zone width, L proportional variant t(2), and the viscous scale, eta proportional variant t(-1/4). Surface-tension effects lead to formation of an emulsionlike state. Density fluctuations on scales larger than the typical drop size, l, are governed by the Obukhov-Corrsin cascade. If l >> eta, a wave energy cascade, related to capillary waves propagating along the surfaces of drops, is formed at scales below l, l proportional variant t(-2/5).
authors.affiliation: T-13 & CNLS, Theoretical Division, LANL, Los Alamos, New Mexico 87545, USA.
authors.forename: M
authors.initials: M
authors.lastname: Chertkov
authors.forename: I
authors.initials: I
authors.lastname: Kolokolov
authors.forename: V
authors.initials: V
authors.lastname: Lebedev