Frictional boundary layer effect on vortex condensation in rotating turbulent convection

Abstract

We perform direct numerical simulations of rotating Rayleigh--Bénard convection of fluids with low ($Pr=0.1$) and high ($Pr=5$) Prandtl numbers in a horizontally periodic layer with no-slip top and bottom boundaries. At both Prandtl numbers, we demonstrate the presence of an upscale transfer of kinetic energy that leads to the development of domain-filling vortical structures. Sufficiently strong buoyant forcing and rotation foster the quasi-two-dimensional turbulent state of the flow, despite the formation of plume-like vertical disturbances promoted by so-called Ekman pumping from the viscous boundary layer.

arXiv comment12 pages, 4 figures

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Cited by in corpus (9)

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• Discontinuous Transitions Towards Vortex Condensates in Buoyancy-Driven Rotating Turbulence
• Bistability of the large-scale dynamics in quasi-two-dimensional turbulence
• Robust wall modes and their interplay with bulk turbulence in confined rotating Rayleigh-Bénard convection
• Optimal heat transport in rotating Rayleigh-Bénard convection at large Rayleigh numbers
• Effects of kinematic and magnetic boundary conditions on the dynamics of convection-driven plane layer dynamos
• Internally heated convection with rotation: bounds on heat transport
• Scale-by-scale kinetic energy flux calculations in simulations of rotating convection
• Transition to inverse cascade in turbulent rotating convection in absence of the large-scale vortex