coefficient of resistance to flow. A fluid property that relates the magnitude of fluid shear stresses to the fluid strain rate, or more simply, to the spatial rate of change in the fluid velocity field. Mathematically, this is expressed as: t = m*(dV/dy), where t is the shear stress in the same direction as the fluid velocity V, and y is a direction perpendicular to the fluid velocity direction.

Mechanics glossary. 2013.


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