A viscous fluid is a genuine fluid that flows with some resistance in the opposing direction of its flow. The resistance is called viscosity, and the fluid is viscous. A viscous fluid does have a considerable quantity of viscosity, yet all genuine fluids get a certain proportion of viscosity.
Honey, for example, is a viscous fluid with a high viscosity.
Viscosity
The viscosity of a fluid is a measurement of its resistance to flow. Fluids resist both the relative movement of immersed objects and the mobility of layers with different velocities inside them. In general, viscosity is determined by the state of a fluid, which includes temperature, pressure, and deformation. In some circumstances, however, the reliance on some of these features is minor.
