Couette viscometer
Quick Summary
A Couette viscometer is a scientific instrument used to measure the viscosity, or resistance to flow, of a fluid. This type of viscometer works by measuring the torque transmitted through a fluid that occupies the space between two coaxial cylinders. The outer cylinder is rotated at a uniform angular velocity, and the resulting torque on the stationary inner cylinder is measured.12
This measurement allows for the calculation of shear stress within the fluid. The principle relies on how the fluid's angular velocity changes with the radius between the cylinders. The torque transmitted is proportional to the fluid's viscosity, providing a quantitative measure of its flow resistance.2
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