However, if it is around 90 ° C, that is, close to boiling, its viscosity varies and decreases to 0.32 × 10 -3 (N s) / m 2. The scale of viscosity index is numerical in nature, with zero being the most susceptible to changes in viscosity. Generally speaking, the less it changes, across a range of temperatures, the better. Thus, water is thin, having a low viscosity, while vegetable oil is thick having a high viscosity. It is commonly perceived as thickness, or resistance to pouring. The viscosity of water at a temperature of about 20 ° C is 1 × 10 -3 (N s) / m 2. Viscosity Index (VI) is a scale used to measure how much an oils viscosity, or resistance to flow, changes depending on its temperature. Viscosity is a measure of the resistance of a fluid to deformation under shear stress. This property varies according to the velocity gradient of matter. This flow can best be described as the difference between pouring water (with a viscosity of 1) through a funnel and then molasses (which has a viscosity of about 2,000) through the same funnel. It is the result of dividing the shear stress (for example, when we put a knife in mayonnaise) by the deformation rate of the fluid. Simply stated, viscosity is merely a measurement of oil and other fluids' resistance to flow. Explore the definition of viscosity, the equations used to measure it, and the practical uses of both. It is the viscosity that a conventional fluid exhibits against traction forces, representing the relationship between stress and strain rate. Viscosity is a characteristic of thickness that describes a fluid's resistance to flow.
In a fluid at constant temperature, the kinematic viscosity will be calculated by dividing the dynamics by the density of the fluid, and expressing the result in square meters per second.
This also depends on the temperature : the higher the temperature, the lower the viscosity. Usage : Viscosity is the property of liquids which resist the external force applied on the liquid so as to retain.
It is measured, according to the International System (SI) in pascal-seconds. VISCOSITY MEANING IN HINDI - EXACT MATCHES. Also called absolute viscosity, it is understood as the relationship between the velocity gradient (speed of movement of the particles) and the shear stress.