A sharp edged orifice 152mm in diameter discharges oil under a head of 1.04m. The average velocity at the vena contracta is 2.4m per sec.How much head is lost in friction?

The laminar flow takes place between closely spaced parallel plates as shown in figure below. u > V y Ľ The velocity profile is given by u = v. The gap height h is 5 mm and the space is filled with oil (specific gravity = 0.86, viscosity μ = 2 x 10-4 N-s/m²). The bottom plate is stationary and the top plate moves with a steady velocity of v= 5cm/s. The area of the plate is 0.25 m². The rate of rotation of a fluid particles is given by

9. Water at 20 C flows in a 10 cm diameter commercial steel pipe that 100m long with an average velocity of 8m/s. what is the frictional pressure drop for this pipe? a. 109 kPa b. 473 kPa c. 248 kPa d. 544 kPa