Consider incompressible flow in the entrance of a circular tube, as in Fig. P3.53, the inlet flow is uniform, u1 = Uo. The flow at section 2 is developed pipe flow. Find the wall drag force F as a function of (p1, p2, ρ, Uo, R) if the flow at section 2 is
(a) Laminar: u2 = um (1-r/R2)
(b) Turbulent u2 = max (1-r/R2)1/7

Transcribed Image Text:

Friction drag on fluid