Reynolds number

== English == === Etymology === Named after British engineer Osborne Reynolds. === Noun === Reynolds number (plural Reynolds numbers) (physics) A dimensionless parameter that determines the behavior of viscous flow patterns. In pipe flow a value less than about 2,000 (known as the critical Reynolds number) produces laminar flow, one above about 3,000 produces turbulent flow (intermediate values produce unpredictable behavior). ==== Translations ==== ==== See also ==== critical Reynolds number