These velocities may have different directions as well. The term Viscosity can be defined as follows: Viscosity is a property of a fluid that describes the resistance in motion between the internal layers of a fluid.Īs we have studied earlier that fluid can internally be divided into multiple layers which possess different velocities. In this book, Newton proposed that when a force is applied to a fluid, such as when a liquid flows through a pipe or a gas moves past an object, the fluid would form adjacent layers that slide past each other with different velocities. The concept of adjacent layers of fluid was first proposed by Sir Isaac Newton in his book “Philosophiæ Naturalis Principia Mathematica” (Mathematical Principles of Natural Philosophy) in 1687. The layers are separated by a small distance known as the boundary layer. Before getting into the topic of high viscosity vs low viscosity of viscosity, let us first know about an important term which is the Adjacent layer of fluids.Īdjacent layers of fluid are layers of the fluid that are in close proximity to each other, with each layer moving at a different velocity. Viscosity was first proposed by Sir Isaac Newton who also gave the well-known law of viscosity. Regarding the study of fluids, an important property was discovered which was termed Viscosity. In chemistry related to fluids, it becomes imperative to study the internal motion or the process being executed when a force or a change in the state of motion of the fluid is being exerted on it.
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