Fluids with the same viscosity at a given temperature do not necessarily have the same viscosity index. Viscosity Index is an empirical number indicating the effect of temperature change on viscosity. Unit of Kinematic Viscosity in the metric system and commonly used in the countries using. It is designed specifically for engineers and scientists. Kinematic Viscosity: the absolute viscosity divided by density.
#KINEMATIC VISCOSITY UNIT PROFESSIONAL#
The method is used predominantly in European countries. This is a screen shot from the professional units conversion program Uconeer from Katmar Software. Units of Kinematic Viscosity Description Examples Description Kinematic viscosity has the dimension length squared per time. 1/10 that of Universal.Įngler degrees are obtained by dividing the outflow time of a specified amount of fluid through a specified orifice by the outflow time of water at 68☏. Saybolt-Furol, SSF, utilizes a larger orifice and is used for very viscous fluids. Saybolt Universal Seconds, SSU, is the kinematic viscosity as determined by the time in seconds required for 60 cc of fluid to flow through a standard orifice. Other units of Kinematic Viscosity in the English system, the most practical unit for makingĬalculations is ft. A more common unit of kinematic viscosity is the square centimeter per second cm 2 /s, which is given the name stokes St after the Irish mathematician and physicist George Stokes (18191903. This unit is so large that it is rarely used. Unit of Kinematic Viscosity in the metric system and commonly used in the countries using the The SI unit of kinematic viscosity is the square meter per second m 2 /s, which has no special name. Kinematic Viscosity: the absolute viscosity divided by density. Unit of Absolute Viscosity in the English system: slugs/(ft)(sec) Viscosity conventionally uses unusual units. Thus, kinematic viscosity is a measure of the stress a fluid experiences for a certain velocity gradient per unit of its density. In general, kinematic voscosity is dynamic viscosity divided by density. Unit of Absolute Viscosity in the metric system: poise and centipose Kinematic viscosity is defined as the dynamic viscosity divided by fluid density. Absolute Viscosity: the force required to move a unit plane surface over another plane surface at unit velocity when surfaces are separated by a layer of fluid of unit thickness.