Fluid Mechanics seventh edition by Frank M. White · Problem 6.1

Viscous Flow in Ducts — Frank M. White

Physics — Fluid Mechanics · reynolds-number-transition

Problem

The accepted transition Reynolds number for flow in a circular pipe is

\text{Re}_{d,\text{crit}} \approx 2300

. For flow through a 5-cm-diameter pipe, at what velocity will this occur at 20°C for (a) airflow and (b) water flow?