Question 1 of 3 · Internal Flow and Pipe Losses · Intermediate · About 22 min
Dose a viscous liquid through a precision line
A precise metering circuit drives a Newtonian liquid of density and dynamic viscosity through a straight horizontal round pipe of internal diameter and length . The measured pressure drop along the fully developed test section is . Assuming laminar flow, calculate mean speed, volume flow rate and Reynolds number, then verify the laminar assumption.

Given
Density: 920 kg/m³
Viscosity: 0.190 Pa·s
Internal diameter: 0.0120 m
Test length: 8.00 m
Pressure drop: 120 kPa
Find
Mean speed
Volume flow rate
Reynolds number and laminar check
Assumptions
Steady fully developed laminar circular-pipe flow.
Horizontal line and negligible entrance loss in the measured section.
Worked solution
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