Question

The Reynold's number (Re) is a dimensionless number used to characterise the type of flow that a fluid exhibits when moving through a pipe. It is given as:

Where ρ is the fluid density (kg m^-3), u is the fluid velocity (m s^-1), d is the pipe diameter (m), and μ is the fluid viscosity (Pa s).

Milk with a density of 1040 ± 7.2 kg m^-3, and a viscosity of 1.4 ×10^-3 ± 0.1 ×10^-3 Pa s is pumped through 76 mm diameter pipe at a flow rate of 13109 ± 286 L h^-1.

What is the absolute uncertainty in the value of Reynolds number for this situation (answer to 0 DP)?

All uncertainties are 95% confidence intervals. There is no uncertainty in the pipe diameter (it is exactly 76 mm).

Answer 1