Kinematic viscosity

The kinematic viscosity is the quotient of the dynamic Viscosité by the Density of the fluid. It is expressed in Stokes (St), but in practice, they is the centistoke ones (cSt) which is generally used. The legal unit (less usual) is the m ² /s = $10^4$ St For example, for the Gas oil, maximum kinematic viscosity must be of 9,5 cSt with 20 °C, that wants to say that this gas oil is 9,5 times more viscous than water.

There exist several kinds of Viscosimètre S, but most usual is the Viscosimètre Engler and the measuring unit is the Engler degree. There exist also tables of correspondence between the various units of viscosity: Engler degrees in Saybolt degrees, centistoke, Redwood, second Saybolt Universal.

As this property is not linear, in order to make it linear in the optimization of the linear programs, one replaces the values of viscosity by linear indices.

Formulate

Kinematic viscosity coefficient:

$\ naked = {\ eta \ over \ rho}$

In this equation:

$\ nu$ is the kinematic viscosity coefficient. It is expressed in stokes or in $m^2 \ over s$
$\ eta$ of Viscosité is the dynamic coefficient. It characterizes the aptitude of the fluid to be run out and is expressed in Pascal second (Pa.s) or the one tenth of a poise (pi)
$\ rho$ is the density of the fluid in $kg/m^3$

Internal bonds

Viscosity
Plan procurement, production and distribution of oil

External bonds

Industrial measurement of viscosities kinematics and dynamic

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