he top surface of an electronic package can be idealized as a flat horizontal surface, which is cooled by a gas with free stream temperature of 293 K. At the trailing edge (the downstream edge) of the...

he top surface of an electronic package can be idealized as a flat horizontal surface, which is cooled by a gas with free stream temperature of 293 K. At the trailing edge (the downstream edge) of the plate, the Reynolds number is Re = 1.1×10⁵
.

a. Measurement shows that the temperature of the plate (which is assumed to be uniform) is 395 K. The desired temperature of the plate surface is 365 K, however. By what factor should the fluid velocity be increased to satisfy the surface temperature requirement?

b. Assume that the fluid is atmospheric air originally flowing at a velocity of 2 m/s. What would be the maximum surface temperature if the total dissipated power was reduced to one third of its original value, but only the downstream half of the plate was heated?