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Rayleigh-Bénard convection: bounds on the Nusselt number

open access: yes, 2016
We examine the Rayleigh–Bénard convection as modelled by the Boussinesq equation. Our aim is at deriving bounds for the heat enhancement factor in the vertical direction, the Nusselt number, which reproduce physical scalings. In the first part of the dissertation, we examine the the simpler model when the acceleration of the fluid is neglected (Pr ...
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Nusselt number scaling in tokamak plasma turbulence

open access: yesNusselt number scaling in tokamak plasma turbulence
K. Takeda et al., Physics of Plasmas 12, 052309 (2005) https://doi.org/10.1063/1.1895165 Anomalous heat transport caused by ion temperature gradient (ITG) driven turbulence in tokamak plasmas is evaluated from numerical simulations of the two-dimensional (2D) partial-differential equations of the ITG model and of a reduced 1D version derived from a ...
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