![kinematic and dynamic viscosity kinematic and dynamic viscosity](https://i.ytimg.com/vi/CH2lz9fBXIg/hqdefault.jpg)
Kinematic viscosity differs from dynamic viscosity in that it only measures how gravity affects a substance’s resistance to flow. Using as little as eight milliliters of a substance, we can measure the dynamic viscosity and report a value in centipoise. Brookfield testing requires that the substance flows readily in a certain fluid motion, but we can test less viscous substances by other techniques. We regularly test gels, lotions, and adhesives using this test. Ī Brookfield test can evaluate if a product meets specific manufacturing or use specifications and is suitable depending on the type of substance being tested. You evaluate dynamic viscosity when you want to understand how the material reacts to deformation, which can be measured by Brookfield or rheometer testing. While the units used to measure each type of viscosity can be converted in order to understand the other, they differ in very fundamental ways.ĭynamic viscosity is the measure of how a fluid resists flow when an external force is applied.
![kinematic and dynamic viscosity kinematic and dynamic viscosity](https://d2vlcm61l7u1fs.cloudfront.net/media%2Fb21%2Fb2112019-1179-47dc-afa1-2492f4c32c7a%2FphprnhlAW.png)
Today, we want to talk about two basic types: dynamic viscosity and kinematic viscosity. Because viscosity is a basic measurement of fluid dynamics, these measurements are important for the characterization of materials. Liquids, gels, and many polymers are often tested to ensure that they meet the standards and specifications as raw materials for the products they are destined to be included in. Viscosity is one of the many metrics we can use for physical analysis of polymer materials.Ī wide range of polymers we test are often the object of scrutiny across industries - from legal testing to complex analysis for research and development. At its basic level, viscosity is the measure of a material’s resistance to flow. Today, we want to explain a complex idea: viscosity. From explaining our testing lab services to examining the “why?” of everyday science, we love what we do. The results indicated that both MIR and NIR can be used to accurately predict the viscosities of biodiesel–diesel blends, but better results can be obtained using NIR spectroscopy.Here at SGS Polymer Solutions, we love to make the world of analytical testing and polymer science more understandable. The RMSEP were 0.070mm2/s for kinematic viscosity and 0.062mm2/s for dynamic viscosity prediction. For the NIR spectroscopy, the PLSR model established using the spectral regions of 1100–1500nm, 1600–1700nm, and 1800–2200nm obtained better results. The root mean square error of prediction (RMSEP) for kinematic viscosity and dynamic viscosity were 0.114 and 0.119mm2/s, respectively, based on the validation set that consisted of 26 biodiesel–diesel blend samples made of six different biodiesel and three different diesel fuels. For MIR spectroscopy, wavelengths in the fingerprint region of 550–1500cm−1 were chosen for developing the model. A partial least square regression (PLSR) modeling method was employed to develop the calibration models based on information from four commonly used biodiesel and three different commercial diesel fuels. This work reports the use of mid- and near-infrared spectroscopy (MIR and NIR) to predict the kinematic and dynamic viscosities of biodiesel–diesel blends.