Journal
JOURNAL OF FLUID MECHANICS
Volume 864, Issue -, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2019.58
Keywords
Benard convection; geostrophic turbulence; turbulent transition
Categories
Funding
- project Equip@Meso of the programme 'Investissements d'Avenir' [ANR-10-EQPX-29-01]
- GENCI-IDRIS [A0020407543, A0040407543]
- UK Natural Environment Research Council [NE/M017893/1]
- European Research Council under the European Union [681835-FLUDYCO-ERC-2015-CoG]
- Lorentz Center at the University of Leiden
- NERC [NE/M017893/1] Funding Source: UKRI
Ask authors/readers for more resources
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 such as atmospheric or oceanic circulations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available