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Journal Articles Proceedings of the National Academy of Sciences of the United States of America Year : 2018

Radiative heating achieves the ultimate regime of thermal convection

Abstract

Turbulent convection is ubiquitous in geophysical and astrophysical contexts: It drives winds in the atmosphere and currents in the ocean, it generates magnetic fields inside planets and stars, and it triggers supernova explosions inside collapsing stellar cores. In many such natural flows, convection is driven by the absorption of incoming radiation (light or neutrinos). We designed an experiment to reproduce such radiatively driven convection in the laboratory. In contrast with convection driven by heating and cooling plates, our radiative heating setup achieves the “ultimate” regime of turbulent convection, which is the one relevant to many natural flows. Such experiments can yield the constitutive laws of turbulent convection, to be implemented into geophysical and astrophysical models.

Dates and versions

cea-01882133 , version 1 (26-09-2018)

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Simon Lepot, Sébastien Aumaître, Basile Gallet. Radiative heating achieves the ultimate regime of thermal convection. Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (36), pp.8937 - 8941. ⟨10.1073/pnas.1806823115⟩. ⟨cea-01882133⟩
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