|George Gabriel Stokes fluid dynamics
A property of a flowing gas or liquid, the ratio of its inertial and viscous forces and proportional to its speed for a given length, the Reynolds number helps predict the scaling effects and the transition of laminar to turbulent flow of fluids in pipes, of air over airplane wings, and of weather conditions. A high Reynolds number means that inertial forces outweigh viscous forces, and a low Reynolds number means that viscous forces outweigh inertial forces.
Stokes introduced the concept in 1851. Osborne Reynolds popularized it in 1883. Arnold Sommerfeld named the number in 1908 to honor Reynold. Can a similar story be told about the Reynolds transport theorem, Reynolds decomposition, Reynolds stress, Reynolds-averaged Navier-Stokes equations, Reynolds dilatancy, and the Reynolds operator?
Your number is not dimensionless. Your number is a measure of you. Your number brings joy to some, and irritates others beyond measure. Some think they have your number; others know it as a mystery of mysteries.