An oil (µ = 20 cP, ρ = 1200 kg/m3) flows through a 2.5 cm I.D. pipe 250 m long.

1.  What is maximum flow in `m^3/s` that will ensure laminar flow ?
2.  What would be pressure drop for this flow?

An oil of viscosity `0.15 (Ns)/m^2` and specific gravity 0.9 is flowing through a circular pipe of diameter 30 mm and of length 3 m at `1/10` th of critical velocity for which Reynolds number is 2450. Find:

1. The velocity of flow through the pipe,
2. The head in metres of oil across the pipe length required to maintain the flow, and
3. The power required to overcome viscous resistance to flow of oil.

An oil (µ = 20 cP, ρ = 1200 kg/m3) flows through a 2.5 cm I.D. pipe 250 m long.

1.  What is maximum flow in `m^3/s` that will ensure laminar flow ?
2.  What would be pressure drop for this flow?

Crude oil of µ = 1.5 poise and relative density 0.9 flows through a 20 mm diameter vertical pipe. The pressure gauges fixed 20 m apart read 600 `(kN)/m^2` and `200( kN)/m^2`, as shown in Figure. Find the direction and rate of flow through the pipe.