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A rheometer is a laboratory device used to measure the way in which a viscous fluid (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 a viscometer .
Anton Paar GmbH is an Austrian company based in Graz that develops, produces and sells analytical instruments for laboratories and process analytical technology. The company operates globally, with subsidiaries in 39 countries. [ 1 ]
The basic design of a rectangular-slit viscometer/rheometer consists of a rectangular-slit channel with uniform cross-sectional area. A test liquid is pumped at a constant flow rate through this channel. Multiple pressure sensors flush-mounted at linear distances along the stream-wise direction measure pressure drop as depicted in the figure:
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Capillary breakup rheometry is an experimental technique used to assess the extensional rheological response of low viscous fluids. Unlike most shear and extensional rheometers, this technique does not involve active stretch or measurement of stress or strain but exploits only surface tension to create a uniaxial extensional flow.
Salman Rushdie was so stunned when a masked man started to stab him on a stage in western New York that the author didn’t even try to fight back, a prosecutor said Monday during opening ...
Acoustic rheometer measures sound speed and attenuation of ultrasound for a set of frequencies in the megahertz range. These measurable parameters can be converted into real and imaginary components of longitudinal modulus. Sound speed determines M', which is a measure of system elasticity. It can be converted into fluid compressibility.
Oil prices jumped to a three-month high on Friday, with traders digesting new sweeping sanctions against Russia as the Biden administration tries to cut off Moscow from crude revenue amid the ...