Two infinitely long parallel plates of width w are located at w distance apart, as shown in

Question:

Two infinitely long parallel plates of width w are located at w distance apart, as shown in Fig. P21€“95. The two plates behave as black surfaces, where surface 1 has a temperature of 500°C and surface 2 has a temperature of 50°C. Determine the radiation heat flux between the two surfaces.

L2 = w 2) ---- -- L5 L1 = w w/2