Reynolds number
/ˈrenəldz/noun
1- Physics a dimensionless number used in fluid mechanics to indicate whether fluid flow past a body or in a duct is steady or turbulent【物理】雷诺数。
1.1
- This is evaluated as ρυd/ν, where d is a diameter or other characteristic length of the system, υ is a typical speed, ρ is the fluid density, and ν is the kinematic viscosity of the fluid. The magnetic Reynolds number is an analogous number used in the description of the dynamic behaviour of a magnetized plasma.数值表示为ρυd/ν,d为装置半径或其他特征长度, υ为典型速率, ρ为流体密度, ν为动力黏度。磁雷诺数为一相似数, 用以描述磁化等离子体的动态表现。
词源
early 20th cent.: named after Osborne Reynolds （1842-1912）, English physicist.