![]() Just as an example, to calculate viscosity index we can use online viscosity index calculator or excel tools. Common methods for viscosity index calculations are ASTM D2270 and ISO 2909. Q: How to calculate viscosity index?Ī: The viscosity index of a fluid (usually oil) is calculated from its viscosity at 40 and 100☌. Therefore higher viscosity index or higher VI means fluid is more stable and less changes in viscosity over a wide temperature ranges. Viscosity index indicates the change in fluid viscosity in dependence of temperature. ![]() Q: What is viscosity index?Ī: Viscosity index of a fluid is a calculated number according to ASTM D2270 or ISO 2909. Seventeen mixing rules reported in the literature used for predicting kinematic viscosity of petroleum and its fractions were examined for accuracy by comparing the estimated values with the experimental viscosities of four crude oils (21.31, 15.93, 12.42 and 9.89API gravity) and their blends with a diluent (diesel) at several proportion. For example the viscosity of honey is higher than the water. ![]() High viscosity fluid has more resistance to flow than a low viscosity fluid. If viscosity of fluid is high, most likely it is difficult to pour. Hence high viscosity fluids flow less easily or slower. Low viscosity fluids (low resistance to move) flow or pour more easily and faster. Therefore oil/fluids are usually measured at the same temperature to calculate viscosity. Lubricants Viscosity and Viscosity index Q: What is Viscosity?Ī: Viscosity is a fluid’s resistance to flow at given temperature. Press Calculate button to calculate kinematic viscosity (KV) As before, use Clear button to reset and calculate a new viscosity. Calculate Viscosity use calculator 3 to calculate viscosity (KV) Enter known viscosity index (VI) and kinematic viscosity (KV) in table 3. Click Calculate to get KV As previously stated, use Clear button to start a new calculation. Enter kinematic viscosity (KV) in the second row. Similarly with known viscosity index (VI) and viscosity It is possible to calculate viscosity For example enter viscosity index (VI) in the first row of second table. Calculate Viscosity possibility is to calculate kinematic viscosity from viscosity index. Finally, press Clear button to start again. Click Calculate button to get viscosity index (VI). In the first row table 1, Enter kinematic viscosity (KV) at 40☌, In the same way enter kinematic viscosity in the second row. To calculate viscosity index we need viscosity of an oil both at 40☌ and 100☌. This tool is subject to change without notice.Standard practice for viscosity index (VI) calculation as per ASTM D2270 and ISO 2909. Use or misuse of this information is at the risk of the user. While Fusion Fluid Equipment strives to provide accurate information, no expressed or implied warranty is given by Fusion Fluid Equipment as to the accuracy and usefulness of this information. Us so that we can work them out together.įusion Fluid Equipment provides this tool for reference only. ![]() If you have questions or concerns with your application, contact To check our work and that of our competitors with our free simplified mixingĬalculator. We are providing a free basic mixing calculator for your reference. You to be confident that you are getting the right mixer for your money, so Competitors want you to believe that mixer sizing requires impossibleĬalculations and a pinch of black magic. ![]()
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