Rotational Rheometer Allows a Much Greater Characterization
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Posted On :
Jan-19-2012
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Article Word Count :
516
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Is the viscosity of the fluid resistance to stress tool. Daily as a liquid or gas thickness. For example, water is a low viscosity.
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Is the viscosity of the fluid resistance to stress tool. Daily as a liquid or gas thickness. For example, water is a low viscosity, so it seems fine. Relatively higher viscosity of honey, so it looks tight. Viscosity describes the essence of the internal fluid flow resistance and can be thought of as a measure of its internal friction.
Viscosity measurement is relatively simple test, and the result is usually reported a single number. Suitable viscosity test results, they should be compared with the results of tests carried out at the same temperature. It is normal for a viscous fluid in colder temperatures at higher temperatures and less viscous.
What is rheology?
Complex rheology to investigate the flow of matter, mainly liquids but also soft solids, gels, pastes, and even sold materials have some level of traffic (ie, not only elastically deformed). Rheology applied to substances which have a complex structure, including: mud, sludge, suspensions, polymers, petrochemicals and biological materials. These complex material flow can be described in one viscosity value, instead of the viscosity changes with changing conditions. For example;
Ketchup "viscosity decreases when moved
Cornmeal while the viscosity increases when it hits
In practice, rheology is concerned with materials whose properties are between purely elastic material and Newtonian fluids, the mechanical behavior can be described in classical theory.
Do I need a viscometer or Rheometer?
There are several ways to evaluate the material viscosity and rheological properties. In both cases, most methods are based around a rotation device which rotates the spindle immersed in the sample. Applying a controlled force or strain and measuring the force or strain, it is possible to understand the means of viscosity and rheological properties of the material to understand.
The difference between the viscometer and Rheometer essentially of components and quality control capabilities. Basically there are more versatile, Rheometer, and have a wider range of applications than viscometer no.
The rotational viscometer is a simple device that rotates the spindle in one direction. Most of the viscometers mechanical bearings, which limits the applications more viscous material. Viscometer for low-cost simple materials, processes, or manufacturing tests that require simple flow measurement instrument. Viscometer is very suitable for quality control testing, and often a laptop, this provides an opportunity to do a remote or field tests.
Rotary Rheometer allows much greater flow and deformation behavior description. Rheometers can apply oscillatory motion and the spindle may also use a large step changes in stress and deformation of the viscoelastic properties, as well as the flow properties. Rheometers usually use ultra-low friction air bearings, which allow much greater sensitivity to low-viscosity samples to be measured. Rheometers also tend to offer a wider range of, for example, temperature control units, study the material in the wider terms of the sampling equipment.
Rheometer usually consists of more investment, but may be essential for realistic modeling of true and complete characterization of the substance. Rheometer more versatility makes it an excellent tool for research, product and process development as well as quality control testing.
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Article Source :
http://www.articleseen.com/Article_Rotational Rheometer Allows a Much Greater Characterization_136276.aspx
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Author Resource :
Visit viscometer.co for all types of viscometer according to your need.
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Keywords :
viscometer, digital viscometer,
Category :
Business
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Business
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