Starting from the appropriate momentum and energy differential equations, evaluate the Nusselt number for both surfaces of a parallel-plane channel in which there is fully developed laminar flow (both velocity and temperature developed) and in which there is heating from both surfaces but the heat flux from one surface is twice the heat flux of the other surface, and again when the heat flux from one surface is five times the heat flux from the other surface. The heat flux per unit length of duct is constant. Your equation should produce what you expect in simpler cases too. Does a symmetric heat flux condition yield Nu 8.23 (as =5.39? This last question should be used as a sanity check for your derivation was derived in class) and does one side heated/other adiabatic yield Nu