VISCOUS FLOW
Problems :
  1. Oil with density and viscosity of flows at through a cast iron pipe of 400m long and 300mm diameter. Determine; (i) head loss; (ii) pressure drop if the pipe slopes down at in the flow direction.
  2. A liquid of density and viscosity of flows through a 20cm diameter pipe 100m long with a head loss of 8m. If the roughness ratio is 0.0002, calculate the average velocity and flow rate .
  3. A smooth brass pipeline of 80mm diameter and 1km long carries water at the rate of : (i) calculate the head loss, wall shear stress, centerline velocity; (ii) shear stress and velocity at 25mm from the centerline; (iii) thickness of laminar sub-layer. Take the kinematics viscosity and density of water as and respectively.
  4. The instantaneous velocity components in a turbulent flow field measured at intervals of 0.06 seconds are as follows;
   
Determine , and local value of Reynolds shear stress. Take the density value as .
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