Viscosity is a measure of a fluid’s resistance to flow. It describes how thick or thin a fluid is, which affects how easily it moves and how it behaves under different conditions.
Characteristics
– High Viscosity: Fluids with high viscosity, like honey or molasses, flow slowly and resist motion.
– Low Viscosity: Fluids with low viscosity, such as water or gasoline, flow easily and quickly.
– Temperature Dependence: Viscosity can change with temperature; for example, heating a fluid typically decreases its viscosity, making it flow more easily.
– Newtonian vs. Non-Newtonian: Newtonian fluids have a constant viscosity regardless of the applied stress, while non-Newtonian fluids can change viscosity based on the stress or shear rate applied.
Examples
– High Viscosity Fluids: Honey, motor oil, and glycerin.
– Low Viscosity Fluids: Water, alcohol, and air.