In a pipe of 300 mm diameter, maximum velocity of flow is found to be 2 m/s. If flow is laminar,find:

• average velocity and radius at which it occurs
• velocity at 50mm from wall of pipe

A lubricating oil of viscosity 1 poise and specific gravity 0.9 is pumped through 

a 30 mm diameter pipe. If the pressure drop per metre length of pipe is `20( kN)/m^2`, determine:

1. The mass flow rate in kg/min,
2.  The shear stress at the pipe wall,
3.  The Reynolds number of flow, and 
4. The power required per 50 m length of the pipe to maintain the flow.

In a pipe of 300 mm diameter, maximum velocity of flow is found to be 2 m/s. If flow is laminar,find:

• average velocity and radius at which it occurs
• velocity at 50mm from wall of pipe

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.