Taylor Number


In fluid dynamics, the Taylor number (Ta) is a dimensionless quantity that characterizes the importance of centrifugal “forces” or so-called inertial forces due to rotation of a fluid about an axis, relative to viscous forces.

In 1923 Geoffrey Ingram Taylor introduced this quantity in his article on the stability of flow.

Related formulas


TaTaylor number (dimensionless)
Ωcharacteristic angular velocity (1/s)
Rcharacteristic linear dimension perpendicular to the rotation axis (m)
vkinematic viscosity (m2/s)