Viscosity

Question

What is difference between viscosity and inviscid fluid

Praveen Kumar Kushwaha · Answer

The property of resistance to flow in any material with fluid properties.
The mathematical ratio of the tangential frictional force per unit area to the velocity gradient perpendicular to the direction of flow of a liquid — called also coefficient of viscosity.

Isaac Newton expressed the viscous forces by the differential equation
T= μ(∂u/∂y)
where τ = F/A, and ∂u/∂y is the local shear velocity.

Sahil Sinha · Answer

The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress . Viscosity is the property of a fluid which opposes the relative motion between two surfaces of the fluids that are moving at different velocities .
Inviscid flow is the flow of an inviscid fluid in which the viscosity of the fluid is equal to zero . This is practically not possible but ideally it can be true .

Amit Kumar Sahu · Answer

viscosity is the thickness or stickyness of a fluid. it is mainly due to internal friction of the fluid.

Yanchen Oinam · Answer

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.
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. DIY Method to Measure Viscosity:
You can think in terms of different fluids taking different times to, for example, pour out of a cup. Water will pour out of a glass in a fraction of a second and will take the shape of the receiving container in just as short of a time. On the other hand, a high viscosity fluid like honey would take minutes to pour out and the interface between honey and air would take just as long to settle. You might have notice that I have been talking about time when trying to establish which of those two fluids is more viscous. That's what we refer to as a measurement of kinematic viscosity or how fast does a fluid flow for a given force applied to it. In this example, the applied force is gravity. Viscous and Inviscid flow: The fluid flow in which frictional effects become signification, are treated as viscous flow. When two fluid layers move relatively to each other, frictional force develops between them which is quantified by the fluid property ‘viscosity'. Boundary layer flows are the example viscous flow. Neglecting the viscous terms in the governing equation, the flow can be treated as inviscid flow.

Dev Narayan Gupta · Answer

viscosity is a tranport property of fluids. in which it resist the flow of fluids in two adjacent layers of fluids.....but
viscous fluids is a fluids which have a less tendency to flow in others words u can say that more viscous fluid then less flowable it means the resistance of fluids is much more....