Reynolds published the governing dimensionless number for vortex flow in 1883.

Evidence

In 1883, Osborne Reynolds published a landmark paper, defining what came to be called the Reynolds number (although Stokes had made the same suggestion in 1851). — Eric J. Heller, Why You Hear What You Hear- An…, 1298

Categorization

• DEFINE: Introduces the Reynolds number, a central concept for scaling flow patterns.