Magnetohydrodynamic instability of mixed convection in a differentially heated vertical channel B. M. Shankar, Jai Kumar and I. S. Shivakumara Eur. Phys. J. Plus, 134 2 (2019) 53 Published online: 05 February 2019 DOI: 10.1140/epjp/i2019-12402-0