Question$-1$:

A $66$ cm $-$diameter cylinder is heated to a temperature of $250$@$C,$ and air at $25C$ is flowing across it at a velocity of $50\frac{m}{s}.$ If the surface emissivity is $0\mathrm{.}7..$

a$.$ Sketch the schematic of the system with complete labeling.

b$.$ calculate the total heat loss per unit length if the walls of the enclosing room are at $10C.$

c$.$ Using EES software, investigate the effects of the surface emittance on the Heat loss. Let the emittance vary from $0\mathrm{.}01$ to $0\mathrm{.}98.$ Plot the emittance as the function of heat loss. Show the screenshots of the programming code and graphs in EES.