Oil, with = 890 kg/m3 and = 0.07 kg/ms, flows through a horizontal pipe 15 m long.

Question:

Oil, with ρ = 890 kg/m3 and μ = 0.07 kg/m⋅s, flows through a horizontal pipe 15 m long. The power delivered to the flow is 1 hp. (a) What is the appropriate pipe diameter if the flow is at the laminar transition point? For this condition, what are (b) Q in m3/h; and (c) τw in kPa?