Table 2: Air velocity.

Heat flux 2.77 g·m−1·s−1 4.44 g·m−1·s−1 Aluminium-plexiglass distance = 5 cm 1600 W·m−2 0.52 0.73 2800 W·m−2 0.82 1.16 Aluminium-plexiglass distance = 10 cm 1600 W·m−2 0.28 0.34 2800 W·m−2 0.32 0.44