![]() ![]() As high viscous fluids have high internal friction between adjacent layers of fluids, they can not shear easily. ⇒ High viscosity means the fluid feels high resistance between the adjacent layers of the fluid during their relative motion. What happens when the viscosity of fluid is too high? Fluid ViscosityĬps (centipoise) Air 0.002 Aceton 0.03 Water 1.00 Milk 2.00 Blood 10 Glycerine 1000 – 2000 Honey 2000 – 3000 Glue 3000 Ketchup 5000 – 20000 Peanut Butter 10 4 – 10 6 Pitch 2.3 x 10 11įluids with extremely high viscosity, such as peanut butter and pitch, act like solids. The viscosity of some common fluids is mentioned in the chart below, ranging from low to high. If a fluid has a viscosity greater than that of water, it is termed viscous if it has a viscosity less than that of water, it is considered mobile. ![]() That is why water can flow with ease than honey. But if you think of water and honey, then water has lower viscosity than honey. If you consider air and water, water has a higher viscosity than air as the air feels less resistance while flowing than water. Image credits: Pixabay Free image Examples: Honey, pitch etc. The movement of fluid with low viscosity is quick. The movement of fluid with high viscosity is sluggish or slow. To overcome friction or move through a fluid with low viscosity, one needs less force. To overcome friction or move through a viscous fluid with a high viscosity, one needs a lot of force. Fluids can easily shear due to their low resistance. Fluids cannot easily shear due to their high resistance. When a low internal friction force occurs during the relative motion of adjacent layers, the fluid is said to have a low viscosity. ![]() The following describes the difference between high and low viscosity: High viscosity Low viscosity When a high internal friction force occurs during the relative motion of adjacent layers, the fluid is said to have a high viscosity. The difference between high and low viscosity: Let’s talk about high viscosity vs low viscosity, which is the focus of this post. Viscosity can be grouped into two categories based on fluid flow resistance: Shear creates when liquid is poured in tube Thus, fluid movement creates shearing as the speed of the fluid is different near the wall and near the axis, as shown in the following figure. Suppose a fluid is poured into the tube, then it flows slowly near the wall of the tube and quickly near the axis of the tube. ![]() GIF credits: Synapticrelay, Viscosities, CC BY-SA 4.0 Flow of Low viscous (Left side) & High viscous (Right side) Fluid Thus, the internal resistance felt by the fluid while flowing is termed viscosity. Friction will form between these layers as they move, preventing the flow. The relative motion of the fluid layers is referred to as fluid flow. When it comes to fluids, one of the most essential terms you’ll come across is viscosity. The science of the viscosity:Įvery movement is accompanied by friction. We’ll look at the basic idea of viscosity before diving into high viscosity vs low viscosity in depth. On the other hand, if a fluid moves slowly, its viscosity is said to be high. The viscosity of a fluid is said to be low if it moves quickly. The ability of a fluid to flow is its viscosity. We’ll go into high viscosity vs low viscosity in depth in this post. When studying fluid mechanics, you will encounter the terms high viscosity and low viscosity. ![]()
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