释义 |
reyn·olds number \ˈrenəldz-\ noun Usage: usually capitalized R Etymology: after Osborne Reynolds died 1912 English physicist : an abstract number characteristic of the flow of a fluid in a pipe or past an obstruction used especially in the testing of scale models of airplanes in a wind tunnel : the ratio of the product of the density of the fluid, the flow velocity, and a characteristic linear dimension of the body under observation to the coefficient of absolute viscosity |