DNS of Rayleigh-Darcy convection up to Ra=10^6 shows linear Nu-Ra scaling with a slope change at Ra≈4×10^5 marking the ultimate regime, accompanied by protoplume-to-megaplume evolution and boundary-layer thinning.
Journal of Fluid Mechanics , author=
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Experiments identify five regimes in porous media convection and show Darcy number strongly affects transitions between Rayleigh-Darcy and Rayleigh-Bénard behaviors.
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Ultimate regime in Rayleigh-Darcy Convection
DNS of Rayleigh-Darcy convection up to Ra=10^6 shows linear Nu-Ra scaling with a slope change at Ra≈4×10^5 marking the ultimate regime, accompanied by protoplume-to-megaplume evolution and boundary-layer thinning.
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An experimental study on the heat transport in porous media convection
Experiments identify five regimes in porous media convection and show Darcy number strongly affects transitions between Rayleigh-Darcy and Rayleigh-Bénard behaviors.