Three-dimensional quasiperiodic torsional flows in rotating spherical fluids at very low Prandtl numbers

The aim of this study is to determine through numerical simulations the extent and robustness three-dimensional torsional dynamics thermal convection in rotating spherical fluids at very low Prandtl numbers. It known that kinetic energy periodic axisymmetric flows propagates latitudinally on surface sphere. Here, it shown when axisymmetry broken a secondary Hopf bifurcation, flow starts drift azimuthal direction giving rise quasiperiodic motion latitude longitude. double propagation gives meandering path energy, which still concentrated surface, but highly localized. Several new stable states with different symmetries have been identified large range Rayleigh numbers, all them retaining basic velocity field. Particular attention paid their dependence number values frequencies, mean zonal flow, fluid.