Viscosity
When two fluid layers move relative to each other, a friction force develops between them and the slower layer acts to slow down the faster layer. This internal resistance to flow is described by the fluid property called viscosity, which reflects the internal stickiness of the fluid. In liquids, viscosity arises from cohesive molecular forces, while in gases it results from molecular collisions.
Extends: Viscosity, [Articles containing video clips](https://wikipedia.org.ai/Articles containing video clips), Aerodynamics, [Fluid dynamics](https://wikipedia.org.ai/Fluid dynamics)
Properties
| Property | Expected Type | Description |
|---|---|---|
| Bgcolour | Text | {red} |
| Name | Text | Viscosity |
| Image | Text | Viscosities.gif |
| Caption | Text | A simulation of liquids with different viscosities. The liquid on the left has lower viscosity than the liquid on the right. |
| [Unit Of Dynamic Viscosity](https://wikipedia.org.ai/Unit Of Dynamic Viscosity) | Text | Pa, s, N, s, m, kg, s, m |
| Symbols | Text | η, μ |
| Derivations | Text | μ = G·t |