Recently, Sengupta and Ghosh [Phys. Fluids 34, 054116, (2022)] published a linear stability analysis of a pressure-driven channel flow which is subject to rotation around a spanwise axis and a uniform magnetic field which is applied in the same direction. Unfortunately, the formulation of the magnetohydrodynamic part of the problem contains an elementary error which makes the obtained results unphysical. The error is due to unfounded omission of the electric potential contribution in the induced electric current which, thus, does not satisfy the charge conservation.
|Journal||Physics of Fluids|
|Early online date||25 Aug 2022|
|Publication status||E-pub ahead of print - 25 Aug 2022|
Bibliographical noteThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Priede, J 2022, 'Comment on "Linear stability of a rotating channel flow subjected to a static magnetic field " [Phys. Fluids 34, 054116 (2022)]', Physics of Fluids, vol. (In-press), pp. (In-press) and may be found at https://dx.doi.org/10.1063/5.0103619
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