Large-scale vortices in rapidly rotating Rayleigh–Bénard convection

Transitions in rapidly rotating convection driven dynamos.

Numerical simulations of dynamos in rotating Rayleigh-Bénard convection in plane layers are presented. Two different types of dynamos exist which obey different scaling laws for the amplitude of the magnetic field. The transition between the two occurs within a hydrodynamically uniform regime which can be classified as rapidly rotating convection.

Inverse cascade and symmetry breaking in rapidly rotating Boussinesq convection

epl draft Breakdown of large - scale circulation in turbulent rotating convection

Turbulent rotating convection in a cylinder is investigated both numerically and experimentally at Rayleigh number Ra = 10 and Prandtl number σ = 6.4. In this Letter we discuss two topics: the breakdown under rotation of the domain-filling large-scale circulation (LSC) typical for confined convection, and the convective heat transfer through the fluid layer, expressed by the Nusselt number. The...

The large-scale flow structure in turbulent rotating Rayleigh–Bénard convection

We report on the influence of rotation about a vertical axis on the large-scale circulation (LSC) of turbulent Rayleigh–Bénard convection in a cylindrical vessel with aspect ratio Γ ≡ D/L = 0.50 (where D is the diameter and L the height of the sample). The working fluid is water at an average temperature Tav = 40 ◦C with a Prandtl number Pr = 4.38. For rotation rates Ω . 1 rad s−1, correspondin...

Heat transport and the large-scale circulation in rotating turbulent Rayleigh–Bénard convection

Measurements of the Nusselt number Nu and of properties of the large-scale circulation (LSC) for turbulent Rayleigh–Bénard convection are presented in the presence of rotation about a vertical axis at angular speeds 0 Ω <∼ 2 rad s−1. The sample chamber was cylindrical with a height equal to the diameter, and the fluid contained in it was water. The LSC was studied by measuring sidewall temperat...