Question

Lubricating oil of specific gravity 0.85 and dynamic viscosity 0.1 Ns/m is pumped
through a 3 cm diameter pipe. If pressure drop per meter length of the pipe is 15kPa,
determine (i) the mass flow rate in kg/min; (ii) the shear stress at the pipe wall; (iii) the
Reynold's number of flow and (iv)the power required per 40 m length of the pipe to
maintain the flow.​

Answer 1

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Answer 2

Answer:

A lubricating oil of viscosity 1 poise and specific gravity 0.9 is pumped through a 30mm diameter pipe. If the pressure drop per meter length of pipe is 20kN/m2, determine:

i) The mass flow rate in kg/min,

ii) The shear stress at the pipe wall,

iii) The Reynolds number of flow and,

iv) The power required per 50 m length of the pipe to maintain the flow.