Regime Transition in the Energy Cascade of Rotating Turbulence
arXiv:1811.01034 · doi:10.1103/PhysRevE.99.053103
Abstract
Transition from a split to a forward kinetic energy cascade system is explored in the context of rotating turbulence using direct numerical simulations with a three-dimensional isotropic random force uncorrelated with the velocity field. Our parametric study covers confinement effects in large aspect ratio domains and a broad range of rotation rates. Results indicate that for fixed geometrical dimensions the Rossby number acts as a control parameter, whereas for a fixed Rossby number the product of the domain size along the rotation axis and forcing wavenumber governs the amount of energy that cascades inversely. The regime transition criterion hence depends on both control parameters.
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- Onset of three-dimensionality in rapidly rotating turbulent flows
- Energy cascades in rapidly rotating and stratified turbulence within elongated domains
- Chaotic measure of the transition between two and three dimensional turbulence
- Effect of confinement on the transition from 2D to 3D fast rotating flows
- Inverse Energy Cascade in Turbulent Taylor-Couette Flows
- Bursting of columnar structures in forced rotating turbulence
- Transition to inverse cascade in turbulent rotating convection in absence of the large-scale vortex