Unit nm²/h square nanometre per hour Kinematic Viscosity In the field of fluid dynamics, kinematic viscosity is a measure of a fluid's resistance to flow and shear deformation. It is a property which describes the ease or difficulty with which the fluid molecules move, slide, or flow past one another under external forces or pressure. Kinematic viscosity is represented as the ratio of a fluid's dynamic viscosity to its density. Unit nm²/h (square nanometer per hour) is a way to measure kinematic viscosity by denoting the amount of flow resistance on a microscopic level. A square nanometer (nm²) is a unit of area (10^(-18) square meters) and an hour is a unit of time. Therefore, nm²/h represents the degree to which a fluid flows or resists flow on a very small scale over the course of an hour. For example, if a fluid has a kinematic viscosity of 1 nm²/h, it means that there is a relatively low resistance to flow between the fluid molecules and they can easily slip past each other in a given hour. If the kinematic viscosity is higher, say 10 nm²/h, it indicates that the fluid has a higher resistance to flow and the fluid molecules cannot move as easily past each other within the same time frame. In summary, the unit nm²/h provides a way to compare how easily or difficult different fluids flow and resist deformation at an extremely small spatial scale.