Three-dimensional flow of a power-law nanofluid within a cubic domain filled with a heat-generating and 3D-heterogeneous porous mediumSameh E. Ahmed, Zehba A. S. Raizah and Abdelraheem M. AlyEur. Phys. J. Spec. Top., 230 5 (2021) 1185-1199DOI: https://doi.org/10.1140/epjs/s11734-021-00040-0