Free Convection Heat Transfer in Composite Enclosures with Porous and Nanofluid Layers

Table 1

Thermophysical properties of the nanofluids used in this work.

Materials	Water	Al2O3
Specific heat capacity, (J kg K)	4,179	765
Density, (kg m)	997.1	3,970
Thermal conductivity, (W m K)	0.613	40
Thermal expansion coefficient, (K)