Rey|nold's number

Rey|nold's number «REHN uhldz»,

a mathematical factor used to express the relation between the velocity, viscosity, density, and dimensions of a fluid in any system of flow. It is used in aerodynamics to correct the results of tests of scale-model airplanes in wind tunnels.

╂[< Osborne Reynolds, 1842-1912, a British scientist, who determined it]