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Difference between revisions of "Rheometers"
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[[Category:Meters, Gauges]]{{Knoppen}} | [[Category:Meters, Gauges]]{{Knoppen}} | ||
[[File:Rheometers1.png|thumb|right|Rheometers]] | [[File:Rheometers1.png|thumb|right|Rheometers]] | ||
[[File:Rheometers.jpg|thumb|right|Rheometers]] | [[File:Rheometers.jpg|thumb|right|Rheometers]] | ||
'''Rheometer''' is a laboratory device used to measure the way in which a liquid, suspension or slurry flows in response to applied forces. It is used for those fluids which cannot be defined by a single value of viscosity and therefore require more parameters to be set and measured than is the case for [[Viscometers]]. It measures the rheology of the fluid.There are two distinctively different types of rheometers. Rheometers that control the applied shear stress or shear strain are called rotational or shear rheometers, whereas rheometers that apply extensional stress or extensional strain are extensional rheometers. Rotational or shear type rheometers are usually designed as either a native strain-controlled instrument or a native stress-controlled instrument . | A '''Rheometer''' is a laboratory device used to measure the way in which a liquid, suspension or slurry flows in response to applied forces. It is used for those fluids which cannot be defined by a single value of viscosity and therefore require more parameters to be set and measured than is the case for [[Viscometers]]. It measures the rheology of the fluid.There are two distinctively different types of rheometers. Rheometers that control the applied shear stress or shear strain are called rotational or shear rheometers, whereas rheometers that apply extensional stress or extensional strain are extensional rheometers. Rotational or shear type rheometers are usually designed as either a native strain-controlled instrument or a native stress-controlled instrument . | ||
The word rheometer comes from the Greek, and means a device for measuring flow. In the 19th century it was commonly used for devices to measure electric current, until the word was supplanted by galvanometers and [[Ammeters]]. It was also used for the measurement of flow of liquids, in medical practice and in civil engineering . This latter use persisted to the second half of the 20th century in some areas. Following the coining of the term | The word rheometer comes from the Greek, and means a device for measuring flow. In the 19th century it was commonly used for devices to measure electric current, until the word was supplanted by galvanometers and [[Ammeters]]. It was also used for the measurement of flow of liquids, in medical practice and in civil engineering . This latter use persisted to the second half of the 20th century in some areas. Following the coining of the term | ||