Viscosity

Viscosity defines the consistency of a substance/fluid. The higher the viscosity the pastier is the fluid/liquid. The viscosity is very much influenced by the temperature. Thus, when comparing the values, the temperature should always be considered and indicated. A distinction is made between dynamic (absolute) viscosity – frictional resistance of a fluid against deformation due to tensional or shear stress, measured in mPa.s (millipascal-second), as well as kinematic viscosity – internal friction of a fluid, measured in m²/s (square meter per second). The kinematic viscosity is calculated by dividing the dynamic viscosity by the density of the fluid.