Fluid Mechanics seventh edition by Frank M. White · Problem P6.18
Viscous Flow in Ducts — Frank M. White
Physics — Fluid Mechanics · laminar-pipe-flow
Problem
To determine the viscosity of a liquid of specific gravity 0.95, you fill, to a depth of 12 cm, a large container that drains through a 30-cm-long vertical tube attached to the bottom. The tube diameter is 2 mm, and the rate of draining is found to be 1.9 cm3/s. What is your estimate of the fluid viscosity? Is the tube flow laminar?