Note: The fluid data listing contains viscosity information in Centistokes. This is a common method of expressing viscosity. Usually the Centistokes value has been converted from some timed test methods of establishing viscosity, such as Redwood 1 (Britain), Saybolt Seconds Universal SSU (U.S.A.) or degree Engler (Germany).
The S.I. units for Centistokes are:
1 Centistoke = 1 mm² /s = 10-6 m² /s
This is known as Kinematic Viscosity.
Centipoise is an another method of expressing viscosity.
The S.I. units for Centipoise are:
1 Centipoise = 1 mPa s = 10-3 Pa s
This is known as Absolute Viscosity.
Care must be taken to enter the viscosity in the appropriate Viscosity Units when entering new fluid data.
Kinematic Viscosity = Absolute Viscosity / Fluid density
Where the fluid density is Relative Density (to Water) = 1000 kg / m3 = 1 kg / litre = g / cm3
Approximate viscosity equivalents
A listing of some approximate viscosity equivalents is included to assist the user in converting from various viscosity scales to Centistokes.
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