. Laminar Heat Transfer of a Power-law Fluid. A non-Newtonian power-law fluid banana pure flowing at a rate of 300 lb/h inside a 1.0-in.-ID tube is being heated by a hot fluid flowing outside the tube. The banana pure enters the heating section of the tube, which is 5 ft long, at a temperature of 60F. The inside wall temperature is constant at 180F. The fluid properties as given by Charm (CI) are p = 69.9 lbm/ft.c, 0.875 btu/lbm: F, and k 0.320 btu/h ft F. The fluid has the following rheological constants: n n' = 0.458, which can be assumed constant and K 0.146 lb, s" ft2 at 70F and 0.0417 at 190 F. A plot of log K versus TF can be assumed to be a straight line. Calculate the outlet bulk temperature of the fluid in laminar flow.