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What is the formula for Coefficient of viscosity of a liquid?

Posted in Friction In Solids and Liquids | Email This Post Email This Post |

Coefficient of viscosity of a liquid is defined as the viscous force acting per unit area between two adjacent layers of a liquid with a velocity gradient normal to the direction of flow of the liquid.

The formula for Coefficient of viscosity (η) of a liquid is given as,

Coefficient of viscosity of a liquid

 

where F= viscous force , A = Area , (dv/dx) = velocity gradient

 

η = F / A(dv/dx) .

SI unit of Coefficient of viscosity (η) of liquid is kg m-1 s-1.

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Comments
  • Mubarak January 19, 2018 at 1:36 am

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  • Deepak kumar December 30, 2018 at 6:29 am

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  • Mohamed February 6, 2019 at 10:35 am

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  • Sanjiv March 26, 2019 at 4:56 am

    Hello sir. The gradient of velocity, dv/dx, for honey would be more than that of water. When applied in this formula, we will see that the coefficient of viscosity, and thus, the viscosity of water is higher than that of honey. Which is obviously not true. Please explain. Thanks.