![]() So, the definition of viscosity would be a fluid’s resistance to flow. Viscosity can be simply explained as the resistance caused due to friction between adjacent layers of a liquid that are in relative motion. Viscosity explainedĪs you have seen, more viscous fluid like honey tends to flow slowly, and less viscous fluid, for example, water, flows freely. ![]() So, we can say that honey is more viscous than water. This thickness or friction of liquids is referred to as the viscosity of a liquid. This is because of an internal resistance between the molecules that prevent a liquid from moving. Did you notice any difference in the time taken by each liquid to reach the respective tumblers? Did honey take more time to reach the tumbler than water or vice versa? Have you ever wondered why honey is thicker than water? Or why do different liquids have different consistency?įor example, just pour some water and honey into different tumblers simultaneously. The viscosity of gases increases with an increase in temperatures as η ∝ √T.Viscosity-Understanding the science of thickness of liquids. Effect of Temperature on Viscosity: The viscosity of liquids decreases with an increase in temperature.The dimensional formula for the coefficient of viscosity is.While in SI system the unit of coefficient of viscosity N s m -2 or deca-poise.In the CGS system, the unit of coefficient of viscosity is dynes s cm -2 or Poise.Thus, the coefficient of viscosity of a liquid is defined as the viscous drag or force acting per unit area of the layer having a unit velocity gradient perpendicular to the direction of the flow of the liquid. If A = 1 m 2 and dv/dx = 1 s -1 then the above expression becomes: Also, the negative sign in the above expression shows that the direction of viscous drag (F) is just opposite to the direction of the motion of the liquid. Here η is called the coefficient of viscosity. This force is present when the fluid surfaces have relative motion. This resistance in liquid motion can be seen as internal friction similar to friction produced by motion on the surface in solids, it is called Viscosity. The flowing fluid has many factors that prevent it from becoming an ideal liquid, not all liquids are ideal liquids, and they exert some resistance to motion. Flowing fluid has many properties, the flowing fluid carries many of the energies inside it. In this article, various different problems on an important property found in liquids will be learned. Since this force is between the layers of liquids, it is also called internal friction. The force generated due to viscosity is called Viscous Force. The property of liquids due to which each fluid opposes the relative motion between its different layers is called Viscosity. Viscosity is the property of the liquids that prevents liquids from spreading. This happens because the viscosity of the two fluids is different. Suppose a person has two bowls, one bowl contains water and the other has honey in it, that honey takes more time to form the shape of the bowl than water. ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.DevOps Engineering - Planning to Production.Python Backend Development with Django(Live).Android App Development with Kotlin(Live).Full Stack Development with React & Node JS(Live).Java Programming - Beginner to Advanced.Data Structure & Algorithm-Self Paced(C++/JAVA).Data Structures & Algorithms in JavaScript.Data Structure & Algorithm Classes (Live).
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