Based on their Measured Viscosity of the Oil Viscosity Index
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Posted On :
Jan-15-2012
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Article Word Count :
575
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Viscosity index scale used to measure how much oil viscosity, or flow resistance changes depending on the temperature.
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Viscosity index scale used to measure how much oil viscosity, or flow resistance changes depending on the temperature. In general, the less it changes throughout the temperature, the better. Viscosity index is digital in nature, with a zero is the most sensitive to changes in viscosity. It is often compared to automobile oil industry, and is often abbreviated as VI.
As the oil is heated, reducing its ability to provide effective lubrication. As it decreases friction and increases heat, which can cause mechanical failure. Therefore, more oil can maintain optimum viscosity, the more effective it lubricates the engine and avoid injury. Thus, the viscosity index may be useful in addressing the overall quality of oil is essential information when choosing to use heavy oil, high temperature fluctuations.
Oil viscosity index is based on its measured viscosity at 100 ° F (40 ° C) and 210 ° F (100 ° C), which approximates the temperature of the engine, when it was first turned on, and then after a hot. Less variation, the higher the index score. Since the viscosity index as a comparative measure oil technology has improved and developed the original scale, which lasted up to 100.
The best of modern synthetic - that is the man - the oil level is over 400 scale, and similar petroleum oils exceed 100 characters. In order to facilitate comparison, the scale is sometimes divided into several broad categories, with oil scores below 35 are classified as "Low VI," the score between 35 and 80, as "moderate VI," between 80 and 110 considered "high VI oils;" and more than 110 classified as "very high VI."
There are drawbacks, high viscosity index, however. To achieve a very high VI scores, oil producers are usually injected accessories specially designed to resist temperature change. There is a limit to how many they may be added without affecting other desirable properties of the oil.
Perhaps more importantly, supplies tend to burn under pressure. You can leave the oil can not resist the thinning, and ultimately unable to protect the engine at high temperatures. Viscosity index, as a result should not be the sole determining factor in choosing to use the oil, but it remains a very useful piece of data.
Since there is no single discipline rheology, a rheologist, a scientist has particular field such as physics, engineering or math degree. The truth is that very little knowledge of the discipline to be learned during their undergraduate studies. This is a postgraduate research scholar, that he will receive most of their training on the concepts associated with the flow of matter.
Rheologist can work in many fields, including pharmaceuticals and engineering. For example, some scientists are biorheology the field of bio-fluid-flow study. Other specialty hermorhelogy or blood flow study. Geophysics, rheologist can study lava flows.
In 1929, the increased demand for scientists who have studied the rheology. There were several newly discovered synthetic rubber and polymers, creating the need for knowledge of their flow properties. Rheology Society (SOR) was set up in the same year. SOR later became one of the founders of the American Institute of Physics of the public. Nod study of origin, the organization's motto is known quotes from the Greek philosopher, Simplicio. His motto is Panta rei which translates to "everything flows." Currently taking place in 1800 and published in the Journal of the rheology of six times per year.
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Article Source :
http://www.articleseen.com/Article_Based on their Measured Viscosity of the Oil Viscosity Index_133919.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,
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Business
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