Natural convection analysis flow of Al2O3-Cu/water hybrid nanofluid in a porous conical enclosure subjected to the magnetic fieldRabeh Slimani, Abderrahmane Aissa, Fateh Mebarek-Oudina, Umair Khan, M. Sahnoun, Ali J. Chamkha and M. A. MedebberEur. Phys. J. Appl. Phys., 92 1 (2020) 10904DOI: https://doi.org/10.1051/epjap/2020200260