Subcritical turbulent condensate in rapidly rotating Rayleigh-Bénard convection
arXiv:1901.04269 · doi:10.1017/jfm.2019.58
Abstract
The possibility of subcritical behaviour in the geostrophic turbulence regime of rapidly rotating thermally driven convection is explored. In this regime a non-local inverse energy transfer may compete with the more traditional and local direct cascade. We show that, even for control parameters for which no inverse cascade has previously been observed, a subcritical transition towards a large-scale vortex state can occur when the system is initialized with a vortex dipole of finite amplitude. This new example of bistability in a turbulent flow, which may not be specific to rotating convection, opens up new avenues for studying energy transfer in strongly anisotropic three-dimensional flows.
12 pages, 6 figures
References in corpus (6)
- Growing condensate in two-dimensional turbulence
- Random changes of flow topology in two dimensional and geophysical turbulence
- Inverse cascade and symmetry breaking in rapidly-rotating Boussinesq convection
- Large-scale vortices in rapidly rotating Rayleigh-Bénard convection
- Bi-stability in turbulent, rotating spherical Couette flow
- Rotating Taylor-Green Flow
Cited by in corpus (10)
- Multiple states in turbulent large-aspect ratio thermal convection: What determines the number of convection rolls?
- Turbulent rotating convection confined in a slender cylinder: the sidewall circulation
- Bistability in Rayleigh-Bénard convection with a melting boundary
- Discontinuous Transitions Towards Vortex Condensates in Buoyancy-Driven Rotating Turbulence
- Bistability of the large-scale dynamics in quasi-two-dimensional turbulence
- The interactions of the elliptical instability and convection
- Effect of horizontal magnetic field on Küppers-Lortz instability
- On the inverse cascade and flow speed scaling behavior in rapidly rotating Rayleigh-Bénard convection
- Spontaneous suppression of inverse energy cascade in instability-driven 2D turbulence
- Transition to inverse cascade in turbulent rotating convection in absence of the large-scale vortex