Apr 21, 2020 · An important question in turbulent Rayleigh-B\\'enard convection (RBC) is the effectiveness of convective heat transport, which is conveniently described via the scaling of the Nusselt number ($\\mathrm{Nu}$) with the Rayleigh ($\\mathrm{Ra}$) and Prandtl ($\\mathrm{Pr}$) numbers. In RBC experiments, the heat supplied to the bottom plate is also partly transferred by thermal radiation. This ...