A viscometer (also called viscosimeter) is an instrument used to measure the viscosity of a fluid for liquids with viscosities which vary with flow conditions, an instrument called a rheometer is used thus, a rheometer can be considered as a special type of viscometer viscometers only measure under one flow condition. Guide to measuring oil viscosity | 2 measuring kinematic viscosity gravimetric capillary – the most widely used technique for measuring kinematic viscosity is the use of a gravimetric capillary that is temperature controlled, usually 40 c for single grade oils, and both 40 and 100 c for multigrade oils.
Measuring viscosity is an effective way to know the state (properties of matter) or fluidity of a liquid or gas it plays an important role in the quality control and in various research and development stages of a wide range of industries, including food, chemical, pharmaceutical, petrochemical, cosmetics, paint, ink, coatings, oil and automotives.
Kinematic viscosity is the ratio is the ratio of absolute/dynamic viscosity to density ways to measure viscosity before the begining of the 20th century, in the 1800's, the first measurements of vicsosity were made using capillary tube methods. How to measure viscosity two parts: understanding viscosity measuring viscosity community q&a viscosity can be defined as the measurement of a liquid's resistance to flow, also referred to as a liquid's internal friction consider water and molasses water flows relatively freely, while molasses is less fluid.
Viscosity is the measure of how resistant a substance is to flowing the slower a liquid flows, the higher its viscosity remember—a liquid is a state of matter that has a definite volume, but not a definite shape. The viscosity of a fluid is the measure of its resistance to gradual deformation by shear stress or tensile stress for liquids, it corresponds to the informal concept of thickness: for example, honey has a higher viscosity than water.
The viscosity is determined by measuring the resistance of the spindle as it rotates in the sample rotational viscometers gather data on a material's viscosity behavior under different conditions and are used to measure the viscosity of non-newtonian fluids which change viscosity when a force is applied. Viscosity is the measure of the internal friction of a fluid this friction becomes apparent when a layer of fluid is made to move in relation to another layer the greater the friction, the greater the amount of force required to cause this movement, which is called shear.
What is viscosity there are many different techniques for measuring viscosity, each suitable to specific circumstances and materials the selection of the right viscometer from the scores of instruments available to meet the need of any application is a difficult proposition today's instruments vary from the simple to the complex: from.