MHD natural convection of a CNT-based nanofluid-filled annular circular enclosure with inner heat-generating solid cylinderTahar Tayebi, Hakan F. Öztop and Ali J. ChamkhaEur. Phys. J. Plus, 136 2 (2021) 150DOI: https://doi.org/10.1140/epjp/s13360-021-01106-7