When used in daily language, viscosity refers to “thickness” or internal friction.
As a result of its molecular constitution, a fluid with low viscosity moves easily.
When fluid has a high viscosity, its molecular structure creates a lot of friction within the fluid, making it difficult to move.
It’s a term used to describe the friction that occurs within a moving fluid.
A fluid’s viscosity is a measure of its resistance to movement or evaporation.
In another way, viscosity is defined as, the ratio of fluid’s resistance to fluid flow. Viscosity is defined as a measure of a liquid or gas’s resistance to flowing or changing shape. Viscosity term came from the Latin word “viscum” and the meaning of “viscum” is viscous glue, basically a sticky thing.
The more internal friction a liquid or gas has, the more viscosity it has, and the less it moves.
A high quantity of intermolecular friction causes a liquid or gas to be viscous.
When a raindrop goes quicker, it is the one with the least viscosity (or resistance), which is why it wins.
We’ve all seen two raindrops racing down a windshield, which is an example of viscosity in action.
Water (low viscosity) and honey come to mind (high viscosity), In the case of fluids of differing densities, however, this definition can be a bit perplexing.
Often, viscosity is referred to as a fluid’s thickness.
Viscosity is a concept that is used not only in chemistry but also in physics and engineering.
heat transfer medium in heat exchangers,.
In most processes or industries, we have seen the various use of fluids, like, Processing materials relies heavily on fluid flow. Let’s try to understand the basics of viscosity. Let’s explore! What is Viscosity? Definition, Meaning Viscosity Basics We have a fluid with a shear rate of 0.5 s -1 and shearing stress of 0.76 N/m 2.In this article, we will learn what is viscosity, its type like kinematic viscosity, dynamic viscosity, value for water, air, oil, different formula, etc.
A small hole of area of cross-section… (NEET 2019).
A rectangular film of liquid is extended from.(NEET 2016).
A small sphere of radius ′r′ falls from rest in a viscous liquid.(NEET 2018).
A fluid is in streamline flow across a horizontal pipe of variable area….(NEET 2013).
A certain number of spherical drops of a liquid of radius… (NEET 2014).
Water rises to a height h in capillary tube… (NEET 2015).
The cylindrical tube of a spray pump has radius… (NEET 2015).
A boat with scrap iron in it is floating in a small tank of water… (JIPMER 1998).
A ball whose density is 0.4×103kg/m3 falls into water ….
The bulk modulus of a fluid is inversely proportional to… (JIPMER 1996).
The SI actual unit of dynamic viscosity (μ) is Pascal-second (Pa s), which also can be represented as 1 kg m -1 s -1.
A rotary viscometer is a popular instrument, used to measure dynamic viscosity.
The formula for the dynamic viscosity is given by η = Tγ.
Dynamic viscosity is defined as the tangential force required to move one horizontal plane of a fluid with respect to another.
Whereas, Kinetic Ciscosity is the representation of the inertia along with viscous force. Kinetic Viscosity can be represented as the ration between dynamic viscosity and density.ĭynamic Viscosity is the representation of the viscous force of the fluid. It is represented as the ratio between the sheer strees and sheer strain The symbol of Kinetic Viscosity is v, and the unit of it is m 2/s The Symbol of Dynamic Viscosity is µ, and the unit of it is Ns/m 2 Whereas, Kinetic Viscosity is also know Absolute Viscosity. It can also be expressed as the tangential force per unit area required to move the fluid in a horizontal plane relative to another plane, with a unit value velocity while the molecules of the fluid maintain a distance unitary each on the other.ĭynamic Viscocity can also be known as Absolute Viscosity. Therefore, dynamic viscosity is the force required for fluid to overcome its internal molecular friction so that the fluid can flow.
Viscosity acts as an important property of fluid when analyzing fluid behaviour and fluid movement near solid limits.
It is a type of tangential force that acts when one horizontal plane moves with another.
The dynamic viscosity formula for the fluid will define its internal resistance to flow due to shear force.
Shear stress in the fluid is possible due to the intermolecular friction exerted when layers of fluids attempt to flow over each other. The viscosity of a fluid is the measure of the resistance to its progressive deformation by traction or shear.
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