The velocity of the upper layer increases as the distance of it increases from the fixed layer. These layers are joined by strong intramolecular forces which resist the movement of layers on one another. Based on scientific criteria, viscosity is a law defined by. Viscosity is a measure of resistance to flow which arises due to the internal friction between layers of fluid as they slip past one another while liquid flows. This is what happens with honey, some dairy products, mustard, some sauces or cosmetic products. On the other hand, the coefficient of viscosity increases as the temperature increases in gasses as the already spaced out molecules of the gasses interact and collide with each other more as the temperature increases thereby increasing their coefficient of viscosity. The coefficient of viscosity of liquids decreases with the increase in temperature as the molecules get more excited and expand thereby reducing the resistance that they offer to movement. In an ideal Newtonian fluid, the viscosity of the fluid is directly proportional to the shear rate of the fluid and the constant of proportionality is called the coefficient of viscosity.
For any fluid, this coefficient remains constant and is an intrinsic property of that liquid. The coefficient of viscosity is used to categorically determine the degree of viscosity of any given fluid. It can therefore be measured as the force per unit area required to induce motion. Conversely, it can be thought of as the amount of force required to get the fluid moving. Viscosity, as discussed above is the resistance that a fluid offers to flow. However, as the viscosities of gasses are extremely low, it is imperceptible in everyday life. All fluids including gasses have viscosity. This difference is a function of their respective viscosities.
Water on the other hand has a low viscosity and therefore offers much less resistance to flow.Ī simple example of this would be if you pour down a stream of water and honey side by side on an inclined plane, it’s would be evident that the water would flow down much faster down the incline plane then the honey. Examples of this would be syrup, tar, honey, etc all of which have higher viscosity. In any fluid when the viscosity is large the flow of the fluid will be slower because of the larger amount of resistance put forth by the fluid to the flow. Simply put, viscosity refers to the “fluid’s resistance to flow.” Viscosity also describes the internal friction of a moving liquid. Viscosity is an empirical quantity that describes the resistance a fluid offers to induced flow under the action of an external force.
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