Viscometer for Newtonian fluid viscosity cosmetic&food Viskosimeter für newtonsche Flüssigkeiten

Viscometer for Newtonian fluid viscosity in cosmetic&food&pharma industry

A viscometer (also called viscosimeter)

is an instrument used to measure the viscosity of a fluid. For liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used. Viscometers only measure under one flow condition.
In general, either the fluid remains stationary and an object moves through it, or the object is stationary and the fluid moves past it. The drag caused by relative motion of the fluid and a surface is a measure of the viscosity. The flow conditions must have a sufficiently small value of Reynolds number for there to be laminar flow.
At 20.00 degrees Celsius the viscosity of water is 1.002 mPa·s and its kinematic viscosity (ratio of viscosity to density) is 1.0038 mm2/s. These values are used for calibrating certain types of viscometer.

The instrument apply for the absolute determination of Newtonian fluid viscosity (dynamic viscosity). Widely used in asphalt, oil, paint, paper, food, drugs, adhesives, cosmetics and other production industries and research institutes.
What is A Newtonian fluid, any fluid that exhibits a viscosity that remains constant regardless of any external stress that is placed upon it, such as mixing or a sudden application of force. One example is water, since it flows the same way regardless of whether it is left alone or agitated vigorously. This can be contrasted with non-Newtonian fluids, which can become thicker or thinner when stress is applied. It is possible for the viscosity of a Newtonian fluid to change if it is exposed to different temperatures or pressures instead of external applications of force. Many fluids become thicker as they are cooled, for example, though they still react to shear forces without a change in viscosity.

The defining factor of any

Newtonian fluid

is that it will flow the same when a great deal of force is applied as when it is left alone. This means that it can be mixed vigorously without changing its viscosity. Another way to describe these fluids is that they have a linear relationship between viscosity and shear stress. Regardless of the shear stress applied to these fluids, the coefficient of viscosity will not change.
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viscosity measurement tools

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