Viscosity
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Viscosity
The
viscosity of a fluid is a measure of its tendency to resist an internal shearing force.
Viscosity
= Shear Stress / Shear Rate
Shear
Stress = Force / Area = Mass(M) x Acceleration(Ft/sec/sec) / Ft x Ft
In other
words the Shear Stress can be increased or decreased by either changing the velocity of
the liquid (acceleration) and/or the pipe size.
Shear Rate
= Velocity / Film Thickness = Ft/sec / Ft = 1/Sec (Reciprocal Seconds)
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| The rate is a function of the flow
and the pipe size measured in reciprocal seconds shown in the
following graph. |
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