The Reynolds Number (Re) is the proportional to the ratio of inertial forces and viscous forces in a fluid flow that is a dimensionless number used in fluid mechanics defined as the product of density times velocity times length divided by the viscosity coefficient. The Reynolds Number was introduced in the early 1880's by Osborne Reynolds to characterise the transition between laminar and turbulent flow, and has wide applications, ranging from liquid flow in a pipe, an aircraft wing, predicting the transition from laminar to turbulent flow, and the correlation of experimental data on frictional pressure drop and heat and mass transfer in convective flow, etc.
Related Definitions in the Project: The Property and Unit
