On the role of roughness valleys in turbulent Rayleigh–Bénard convection

Three-dimensional direct numerical simulations are used to characterize turbulent buoyant convection in a box-shaped Rayleigh–Bénard cavity with a rough bottom plate made of a series of square based blocks separated by valleys. The cavity is filled with water. The Rayleigh number varies over five de...

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Veröffentlicht in:	Journal of fluid mechanics 2021-09, Vol.923, Article A6
Hauptverfasser:	Belkadi, Mebarek, Sergent, Anne, Fraigneau, Yann, Podvin, Bérengère
Format:	Artikel
Sprache:	eng
Schlagworte:	Boundary layers Coefficient of friction Computational fluid dynamics Convection Direct numerical simulation Engineering Sciences Fluid flow Fluids mechanics Geometry Heat transfer Influence JFM Papers Mechanics Rayleigh number Rayleigh-Benard convection Roughness Scaling Scaling laws Thermal boundary layer Thermics Valleys
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