viscometer
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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. Thus, a rheometer can be considered as a special type of viscometer. Viscometers can measure only constant viscosity, that is, viscosity that does not change with flow conditions.
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22 sectionsContents
- Standard laboratory viscometers for liquids
- U-tube viscometers
- Falling-sphere viscometers
- Falling-piston viscometer
- Oscillating-piston viscometer
- Vibrational viscometers
- Quartz viscometer
- Quartz crystal microbalance
- Rotational viscometers
- Calculation of shear rate and shear stress form factors
- Cone and plate
- Parallel plates
- Coaxial cylinders
- Electromagnetically spinning-sphere viscometer (EMS viscometer)
- Stabinger viscometer
- Bubble viscometer
- Rectangular-slit viscometer
- Krebs viscometer
- Miscellaneous viscometer types
- See also
- References
- External links
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. Thus, a rheometer can be considered as a special type of viscometer. Viscometers can measure only constant viscosity, that is, viscosity that does not change with flow conditions.
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.