Osborne Reynolds
1842 – 1912
His number tells laminar flow from turbulent.
A British engineer, Reynolds identified in 1883 the dimensionless number that predicts whether flow is smooth or turbulent — the single most important parameter in fluid mechanics, and the one that bears his name.
Every pipe-flow, drag, and fluids tool here checks the Reynolds number first. He turned a qualitative mystery into a calculable threshold.
Portrait: a stylized blueprint-line rendering, not a photograph.
Contributions in the toolbox
- 1883
Dye-filament experiment finds the transition criterion.
→ Reynolds Number