Eddy Viscosity
From ExoDictionary
Eddy Viscosity
The turbulent transfer of momentum by eddies giving rise to an internal fluid friction, in a manner analogous to the action of molecular viscosity in laminar flow, but taking place on a much larger scale.
The value of the coefficient of eddy viscosity (an exchange coefficient) is of the order of 104 square centimeters per second, or 100,000 times the molecular kinematic viscosity.
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
