Note on "Unsteady MHD flow due to non-coaxial rotations of a porous disk and a fluid at infinity", by T. Hayat et al., Acta Mech. 151, 127-134 (2001)

TL;DR

This paper critiques a previous study on unsteady MHD flow caused by non-coaxial rotations of a porous disk, highlighting a flaw and providing corrections based on alternative research.

Contribution

It identifies a critical flaw in the original analysis and offers a corrected approach supported by subsequent research.

Findings

Original flaw in the analysis is corrected.

Corrected model aligns with established results.

Provides a more accurate description of unsteady MHD flow.

Abstract

The cited article contains a serious flaw. A remedy is found in articles by other authors.