Viscosity Basics - Polymer Viscosity Test

Summary：Viscosity, polymer viscosity, viscosity test, viscosity tester

The theory of viscosity determination in the laboratory is generally based on Stokes formula and Poi-seuille formula. The viscosity coefficient is derived. Viscosity depends on the feature of the liquid and temperature. When temperature increases, the viscosity reduced rapidly. Therefore, it is necessary to control the temperature changes accurately, so that can make the experiment make sense. The determination of viscosity parameters is a great significance in production process control, transportability and operability.
It has important value in printing, medicine, petroleum, automobile and so on.


In 1845, In 1845, the British mathematician, physicist Stokes (GG Stokes, 1819-1903) and France's C.L.M.H. Navier ,They found the viscous fluid mechanics of the best equations. The Stokes equation, laid the foundation of traditional fluid mechanics.
In 1851, Stokes deduced the formula of the resistance solid sphere in the slow motion of the viscous medium, and concluded that under the action of the given force (gravity), the resistance was proportional to the flow rate and the viscosity coefficient, The Stokes formula about resistance.


The Navier-Stokes equation is one of the most difficult nonlinear equations in mathematics, and it is very difficult to find its exact solution. Until today, there are only about 70 precise solutions, only about a hundred special solution is solved. Is one of the world-class unsolved and complicate mathematical problems.