1. For flow over a slightly curved surface, the local shear stress is given by the relation Obtain nondimensional relations for the local and average friction coefficients. 2. Calculate the average...

1. For flow over a slightly curved surface, the local shear stress is given by the relation

Obtain nondimensional relations for the local and average friction coefficients.

2. Calculate the average heat transfer coefficient and the friction factor for flow of n-butyl alcohol at a bulk temperature of 20°C through a 0.1 m
 0.1 m square duct, 5 m long with walls at 27°C, if the average velocity is 0.03 m/s.