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Laminar-Pipe-Flow

 An oil of viscosity 9 poise and specific gravity 0.9 is flowing through a horizontal pipe of 60 mm diameter. If pressure drop in 100 m length of pipe is `1800 (kN)/m^2`, determine:

  • The rate of flow of oil
  • The centre line velocity
  •  The total frictional drag over 100 m length
  • The power required to maintain flow
  • The velocity gradient at pipe wall
  • The velocity and shear stress at pipe wall
  • The velocity and shear stress at 8mm from wall.


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This Chapter Laminar-Pipe-Flow consists of the following topics

How world you determine the specific gravity? Explain.

 An oil of viscosity 9 poise and specific gravity 0.9 is flowing through a horizontal pipe of 60 mm diameter. If pressure drop in 100 m length of pipe is `1800 (kN)/m^2`, determine:

  • The rate of flow of oil
  • The centre line velocity
  •  The total frictional drag over 100 m length
  • The power required to maintain flow
  • The velocity gradient at pipe wall
  • The velocity and shear stress at pipe wall
  • The velocity and shear stress at 8mm from wall.

Oil of absolute viscosity 1.5 poise and density 848.3 kg/m3 flows through a ` 30` cm I.D. pipe. If the head loss in `3000` m length of pipe is `20` m, assuming a laminar flow, determine :

  1. the velocity, 
  2. Reynolds number and 
  3. friction factor (Fanningâ??s).

 An oil of viscosity 9 poise and specific gravity 0.9 is flowing through a horizontal pipe of 60 mm diameter. If the pressure drop in 100 m length of the pipe is `1800 (kN)/m^2`

determine:The rate of flow of oilThe centre line velocity The total frictional drag over 100 m lengthThe power required to maintain the flowThe velocity gradient at the pipe wallThe velocity and shear stress at the pipe wallThe velocity and shear stress at 8mm from the wall.

Laminar Pipe Flow

Hydraulics