Reference:  Flow of Fluids – Technical Paper No 410, 1988, Crane Co. Page 3-12, Example 2.


Pipe Flow Expert File: Case_28_Lubricating_Oil_Laminar_Flow_Example_2.pfe


Problem Description: 

A 3” diameter schedule 40 carries SAE 10 lube oil at a velocity of 5.0 ft/s


Find the flow rate and the pressure drop per 100 feet.


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Fluid Data: Oil, viscosity = 95 Centipoise, density = 54.64 lb/ft3


Result Comparison: 


Data Item

Published data

Pipe Flow Expert

Flow rate (gpm )

115 

115

Fluid velocity (ft/s)

5.00

4.991

Reynolds number

1100

1092

Pressure drop per 100 feet(psi)

3.40

3.3665


Commentary: 

The published data and the calculated results compare well.