This study numerically investigates the impact of porous materials

nano-particle types

and their concentrations on transient natural convection heat transfer of nano-fluid inside a porous chamber with a triangular section. The governing equations of the two-phase mixture model are separated on the computational domain and solved using the Finite Volume Method

taking into account the Darcy-Brinkman model for porous medium. It was observed that convection heat transfer inside the triangular chamber consists of three stages named initial

transient

and semi-steady. The features of each step are provided in detail. The results suggested that the use of a hybrid nano-fluid (water/aluminum oxide-cooper) inside a porous glass material and an increase in volume fraction of nano-particles have adverse effects on heat transfer rate. In contrast

as the nano-particle volume fraction of the single nano-fluid (water/aluminum oxide) inside the chamber increased

convection heat transfer rate improved. At the same time

it was observed that the use of both nano-fluids (single and hybrid) in the porous environment of the aluminum foam could improve convection.