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Viscous dissipation as a mechanism for spatiotemporal chaos in Rayleigh-Bénard convection between poorly conducting boundaries at infinite Prandtl number
Phys. Rev. Fluids 7, 113501 – Published 9 November, 2022
DOI: https://doi.org/10.1103/PhysRevFluids.7.113501
Abstract
Nonlinear Rayleigh-Bénard convection in an infinite-Prandtl-number fluid layer between poorly conducting boundaries is considered as a model for convection in the earth's upper mantle. It is shown that accounting for the generally neglected impact of viscous dissipation may lead to the development of large-scale spatiotemporal chaotic dynamics governed by the familiar Kuramoto-Sivashinsky equation , known to occur in various physical systems.
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