Growth rate of the turbulent magnetic Rayleigh-Taylor instability.

The Rayleigh-Taylor instability is strongly modified in the presence of a vertical mean magnetic field. Perturbations are first stretched in the vertical direction with no mixing due to the inhibition of small-scale shear instabilities. Then smooth elongated fingers eventually break after transition to turbulence, and a strong anisotropy persists.

About Universality and Thermodynamics of Turbulence.

This paper investigates the universality of the Eulerian velocity structure functions using velocity fields obtained from the stereoscopic particle image velocimetry (SPIV) technique in experiments and direct numerical simulations (DNS) of the Navier-Stokes equations. It shows that the numerical and experimental velocity structure functions up to order 9 follow a log-universality (Castaing et al. 1993); this leads to a collapse on a universal curve, when units including a logarithmic dependence on the Reynolds number are used.

Connections between centrifugal, stratorotational, and radiative instabilities in viscous Taylor-Couette flow.

The "Rayleigh line" μ=η^{2}, where μ=Ω_{o}/Ω_{i} and η=r_{i}/r_{o} are respectively the rotation and radius ratios between inner (subscript i) and outer (subscript o) cylinders, is regarded as marking the limit of centrifugal instability (CI) in unstratified inviscid Taylor-Couette flow, for both axisymmetric and nonaxisymmetric modes. Nonaxisymmetric stratorotational instability (SRI) is known to set in for anticyclonic rotation ratios beyond that line, i.e.