Viscosity index - Wikipedia
The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The lower the VI, the more the viscosity is affected by changes in temperature.
ASTM D2270 / Viscosity Index (VI) from 40°C and 100°C - Anton Paar
Standard practice for calculating viscosity index from kinematic viscosity at 40 and 100°C. Calculator for viscosity index (VI) according to ASTM D2270 and ISO 2909.
Viscosity Index: What It Is and Why It's Important - Machinery Lubrication
The change in an oil’s viscosity due to a temperature change is called the viscosity index (VI). Understanding VI is important to discern whether the lubricant in question meets the asset’s requirements based on the operating temperature range.
Viscosity Index Calculator and Formula
The Viscosity Index Calculator is a tool designed to calculate the Viscosity Index of an oil or lubricant based on its kinematic viscosities at two different temperatures, typically 40°C (104°F) and 100°C (212°F).
Viscosity Index – About Tribology
Viscosity index means that it measures the change in viscosity with temperature – a high viscosity index indicates a small viscosity change of a petroleum product with changes in temperature. This is the method that determines the viscosity index of lubricating oils.
How to Calculate the Viscosity Index of a Lubricant - PLSI
Learn the step-by-step process to determine the Viscosity Index (VI) of a lubricant using ASTM D2270 standards.
Viscosity index | Anton Paar Wiki
The viscosity index (VI) allows for comparison of the viscosity behavior of different oils based on temperature. Learn more about how to calculate it!
Viscosity Index Review - Engineers Edge
The viscosity index, commonly designated VI, is an arbitrary numbering scale that indicates the changes in oil viscosity with changes in temperature. Viscosity index can be classified as follows: low VI - below 35; medium VI - 35 to 80; high VI - 80 to 110; very high VI - above 110.
Viscosity Index Definition, Formula & Significance - Study.com
2023年11月21日 · Viscosity Index is a measure of how much a fluid's viscosity changes as the temperature of the fluid changes. Viscosity is a liquid's resistance to flow. Some fluids...
Calculate Viscosity Index - Oil Viscosity Chart
Viscosity Index Calculator. This calculator uses centiStokes (cSt), which are equivalent to mm^2/s. If you have the viscosity in centiPoise, divide the centiPoise value by the oil's viscosity to get centiStokes.
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