Taylor number
From Glossary of Meteorology
Taylor number
A nondimensional number arising in problems of a rotating viscous fluid.
It may be written where f is the Coriolis parameter (or, for a cylindrical system, twice the rate of rotation of the system), h is representative of the depth of the fluid, and ν is the kinematic viscosity. The square root of the Taylor number is a rotating Reynolds number, and the fourth root is proportional to the ratio of the depth h to the depth of the Ekman layer.