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What Is Viscosity? How Many Methods Of Expression For Viscosity?
Sep 15, 2017

When the liquid is moved by external forces, the measurement of friction resistance between the molecules is called viscosity. 

The greater the friction resistance, the greater the viscosity; The smaller the friction resistance, the smaller the viscosity.

Viscosity generally has five methods of expression: It is the Dynamic viscosity, the Kinematic viscosity, the Engler viscosity, the Redwood viscosity and the Saybolt viscosity. 

Now use the kinematic viscosity as international standard.

The Kinematic viscosity is a measurement of friction resistance during the liquid flows under the action of gravity, Its value is expressed in (M²/S),usually use(MM2/S).