Supergravitational turbulent thermal convection

@article{Jiang2020SupergravitationalTT,
  title={Supergravitational turbulent thermal convection},
  author={Hechuan Jiang and Xiaojue Zhu and Dongpu Wang and Sander G. Huisman and Chao Sun},
  journal={Science Advances},
  year={2020},
  volume={6}
}
A novel system using supergravity opens a new avenue on the exploration of high–Rayleigh number thermal turbulence. High–Rayleigh number convective turbulence is ubiquitous in many natural phenomena and in industries, such as atmospheric circulations, oceanic flows, flows in the fluid core of planets, and energy generations. In this work, we present a novel approach to boost the Rayleigh number in thermal convection by exploiting centrifugal acceleration and rapidly rotating a cylindrical… 
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References

SHOWING 1-10 OF 59 REFERENCES
Experimental and numerical investigation of turbulent convection in a rotating cylinder
The effects of an axial rotation on the turbulent convective flow because of an adverse temperature gradient in a water-filled upright cylindrical vessel are investigated. Both direct numerical
Turbulent convection at very high Rayleigh numbers
TLDR
Investigating thermal transport over eleven orders of magnitude of the Rayleigh number, using cryogenic helium gas as the working fluid, finds no evidence for a transition to the Ra1/2 regime, and studies the variation of internal temperature fluctuations with Ra, and probe velocity statistics indirectly.
Sloping convection in a rotating fluid
Abstract Laboratory experiments on thermal convection in a fluid which rotates about a vertical axis and is subject to a horizontal temperature gradient show that when the rotation rate Ω exceeds a
Onset of convection induced by centrifugal buoyancy in a rotating cavity
Flows induced by centrifugal buoyancy occur in rotating systems in which the centrifugal force is large when compared to other body forces and are of interest for geophysicists and also in
Convection in the earth's mantle: towards a numerical simulation
Plate tectonics provides a remarkably accurate kinematic description of the motion of the earth's crust but a fully dynamical theory requires an understanding of convection in the mantle. Thus the
Scaling in thermal convection: a unifying theory
A systematic theory for the scaling of the Nusselt number Nu and of the Reynolds number Re in strong Rayleigh–Bénard convection is suggested and shown to be compatible with recent experiments. It
Heat transfer and large scale dynamics in turbulent Rayleigh-Bénard convection
The progress in our understanding of several aspects of turbulent Rayleigh-Benard convection is reviewed. The focus is on the question of how the Nusselt number and the Reynolds number depend on the
Multiple scaling in the ultimate regime of thermal convection
Very different types of scaling of the Nusselt number Nu with the Rayleigh number Ra have experimentally been found in the very large Ra regime beyond 1011. We understand and interpret these results
Search for the "ultimate state" in turbulent Rayleigh-Bénard convection.
Turbulent convection in a fluid heated from below and cooled from above is an important process in many geo- and astro-physical processes with typical Rayleigh numbers RaH1020. It has been
An experimental study of thermal convection in a rotating liquid
  • R. Hide
  • Physics
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1958
An investigation is described of the hydrodynamical flow that ensues when a liquid which rotates uniformly at O about a vertical axis is subject to a horizontal temperature gradient. Although O was
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4
5
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