Reconsider Prob. 13–47. Using EES (or other) Software, investigate the effects of the sid...

 Reconsider Prob. 13–47. Using EES (or other) Software, investigate the effects of the side length and the emissivity of the cubic enclosure, and the emissivity of the spherical tank on the net rate of radiation heat transfer. Let the side length vary from 2 m to 12 m and both emissivities from 0.1 to 0.9. Plot the net rate of radiation heat transfer as functions of side length and emissivities, and discuss the results.