Abstract
In this article, the theoretical model on heat and momentum transfer for Rayleigh–Bénard convection in a vertical magnetic field by Zürner et al. [“Heat and momentum transfer for magnetoconvection in a vertical external magnetic field,” Phys. Rev. E 94, 043108 (2016)] is revisited. Using new data from recent experimental and numerical studies, the model is simplified and extended to the full range of Hartmann numbers, reproducing the results of the Grossmann–Lohse theory in the limit of vanishing magnetic fields. The revised model is compared to experimental results in liquid metal magnetoconvection and shows that the heat transport is described satisfactorily. The momentum transport, represented by the Reynolds number, agrees less well, which reveals some shortcomings in the theoretical treatment of magnetoconvection.
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