What is viscosity and its types?

What is viscosity and its types?

What is viscosity and its types?

Viscosity is a measure of a fluids propensity to flow. There are two kinds of viscosity commonly reported, kinematic and dynamic. Dynamic viscosity is the relationship between the shear stress and the shear rate in a fluid. The Kinematic viscosity is the relationship between viscous and inertial forces in a fluid.

What is viscosity and what causes it?

Viscosity is a measure of the resistance of a fluid towards being deformed when under shear stress. Hence, it is also known as shear viscosity. It is caused by the attractive forces between molecules in close contact, and the friction between molecular chains.

What type of force is viscosity?

Since, the force of viscosity is a result of interaction between different layers of the fluid, therefore it involves interaction between molecules of the layers. Hence it is a type of electromagnetic force.

What is viscosity equal to?

One way to think about viscosity is that it is the amount of force required to get that substance moving. It is the force per unit area, so viscosity is equal to force divided by area.

What is unit of viscosity?

The unit of viscosity is newton-second per square metre, which is usually expressed as pascal-second in SI units.

Is Cossion a viscosity?

The fundamental basis for viscosity observed in fluids is cohesion within the fluids. Viscosity is the resistance of a liquid or a gas to shear forces; it can be measured as a ratio of shear stress to shear strain. As a significant factor in the analysis of fluid flows, viscosity depends on temperature.

How are the different types of viscosity measured?

Types of Viscosity. As we know, the viscosity is the measure of the friction of fluids. There are two ways to measure a fluid’s viscosity as follows: Dynamic Viscosity (Absolute Viscosity)

Why is viscosity important at the molecular level?

At a molecular level, viscosity is a result the interaction between the different molecules in a fluid. This can be also understood as friction between the molecules in the fluid. Just like in the case of friction between moving solids, viscosity will determine the energy required to make a fluid flow. How do we measure it?

How is viscosity related to resistance to flow?

the resistance to flow! Viscosity of often referred to as the thickness of a fluid. You can think of water (low viscosity) and honey (high viscosity). However, this definition can be confusing when we are looking at fluids with different densities.

Which is a higher viscosity syrup or water?

Example: Syrup has a higher viscosity than water. Viscosity is measured in terms of a ratio of shearing stress to the velocity gradient in a fluid. If a sphere is dropped into a fluid, the viscosity can be determined using the following formula: Viscosity is measured in Pascal seconds (Pa s).

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