Comment on "Convection in a horizontal fluid layer under an inclined temperature gradient" [Phys. Fluids 23, 084107 (2011)]

TL;DR

This paper comments on a previous study of convection in a fluid layer under an inclined temperature gradient, highlighting that the equations used are well-established and have been extensively studied both theoretically and experimentally for over fifty years.

Contribution

The paper clarifies that the equations analyzed in the referenced study are not new, as they are well-known and have been thoroughly investigated historically.

Findings

The equations of flow are classical and well-studied.

Previous work has provided exact solutions over fifty years ago.

The study emphasizes the importance of recognizing established theoretical foundations.

Abstract

Ortiz-P\'erez and D\'avalos investigated the stability of parallel convective flow. From the article it seems that this equations of flow obtained by the authors. Meanwhile, it is well studied theoretically and experimentally(exact solution obtained more than half a century ago.