Melting process modeling of Carreau non-Newtonian phase change material in dual porous vertical concentric cylinders

In this paper a numerical simulation of the melting process Carreau non-Newtonian phase change material inside two porous vertical concentric cylinders included constant temperatures inner and outer walls, represented by Th Tc, respectively. Half void between pipes is filled with copper media paraffin wax as material. The governing equations are converted into dimensionless form solved using finite element method. enthalpy porosity theory applied to simulate while follow Darcy law. Outcomes shown compared in terms streamline, isotherm, fraction mean Nusselt numbers. solid liquid interface location temperature distribution predicted describe process. effects index, non-dimensional parameters such Stefan number, Rayleigh number analyzed. Our results indicate good agreement study previous investigations. show that an increase increases volume reduces time. Also, time decreases when index decrease.