Dictionary

Reynolds number en · NOUN

Etymology

Named after British engineer Osborne Reynolds.

Meanings

1. A dimensionless parameter that determines the behavior of viscous flow patterns. In pipe flow a value less than roughly 2,000 (known as the critical Reynolds number) produces laminar flow, one above about 3,000 produces turbulent flow (intermediate values produce unpredictable behavior).
   • Reynold Number [sic]— It determines the state of flow of liquid through a pipe... 1995, Kalra Publications Pvt. Ltd., Supreme Pocket Master: Physics Formulae, 1st Edition, page 136, verso:
   • One certainly can argue that not all low-speed streaks lead to liftup, although if the local Reynolds number exceeds the transition limit, it is certain that eventual transition will occur to the hairpin vortex liftup, which ultimately leads to the breakup state. 1995, William Lawrence Keith, Flow Noise Modeling, Measurement, and Control, page 45:

Forms

Relateds

critical Reynolds number

Translations (6)

pt número de Reynolds (dimensionless parameter of flow) · hu Reynolds-féle szám (dimensionless parameter of flow) · cmn 雷諾數 /雷诺数 (dimensionless parameter of flow) · ja レイノルズ数 (dimensionless parameter of flow) · pl liczba Reynoldsa (dimensionless parameter of flow) · ru число́ Рейнольдса (dimensionless parameter of flow)