Rotating Rayleigh-Taylor turbulence

The Rotating Rayleigh-Taylor Instability

Phenomenology of Rayleigh-Taylor turbulence.

I analyze the advanced mixing regime of the Rayleigh-Taylor incompressible turbulence in the small Atwood number Boussinesq approximation. The prime focus of my phenomenological approach is to resolve the temporal behavior and the small-scale spatial correlations of velocity and temperature fields inside the mixing zone, which grows as proportional, variant t(2). I show that the "5/3"-Kolmogoro...

Rayleigh-Taylor turbulence in two dimensions.

The first consistent phenomenological theory for two- and three-dimensional Rayleigh-Taylor (RT) turbulence has recently been presented by Chertkov [Phys. Rev. Lett. 91, 115001 (2003)]. By means of direct numerical simulations, we confirm the spatiotemporal prediction of the theory in two dimensions and explore the breakdown of the phenomenological description due to intermittency effects. We s...

Convective Turbulence 1 Rayleigh-Taylor Convection

and the gravitational acceleration g = −gẑ. While this a configuration can satisfy hydrostatic balance, infinitesimal perturbations on the interface separating the two fluids at z = H/2 will grow exponentially, leading to overturning. The energy available for overturning can be estimated by considering the fluid energetics. The average potential energy (per unit volume) of the system described ...

Model of convective Taylor columns in rotating Rayleigh-Bénard convection.

Observations, and laboratory and numerical studies, of fluid flows with strong rotation and thermal forcing often show long-lived convective Taylor columns (CTCs) which carry a large portion of the vertical heat and mass fluxes. However, owing to experimental and numerical challenges, these structures remain poorly understood. Here we present a nonlinear, analytical multiscale model of CTCs in ...