a. Repeat the solution assuming that the coolant is air. Compare the results with those obtained in Example 8.4 and discuss the differences. b. Repeat calculations by varying the coolant pressure and...

a. Repeat the solution assuming that the coolant is air. Compare the results with those obtained in Example 8.4 and discuss the differences.

b. Repeat calculations by varying the coolant pressure and plot the heat flux and outside surface temperature as a function of coolant pressure. Determine the pressure at which the coolant (air) must be provided to limit the heat flux at the inner surface of the porous wall to 10 kW/m²
⋅K.