Newtonian viscosity


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Newtonian viscosity

[′nü′tō·nē·ən vi′skäs·əd·ē]
(fluid mechanics)
The viscosity of a Newtonian fluid.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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5 possesses the upper Newtonian viscosity. Therefore, for its description the full model (Eq.
Free volume fraction and Newtonian viscosity for different modifier types and contents.
[[eta].sub.0] Newtonian viscosity. [P.sub.EZ], [P.sub.KN] Pressure in conveying or kneading elements.
The obtained activation energies of flow are 107 KJ/mol, for the Newtonian viscosity, and 74 KJ/mol for the viscosity at 100 [s.sup.-1].
A local power-law model is constructed as the tangent to the viscosity curve at the equivalent Newtonian viscosity for the power-law model which follows from Eqs.
where instead of the consistency index (m) the Newtonian viscosity ([mu]) is used when n = 1 and [U.sub.R] is the velocity at the cylinder surfaces.
The coating fluid was a UV curable polymer with Newtonian viscosity prior to curing.
For the truncated power-law model, [[micro].sub.1] is the limiting Newtonian viscosity at low shear rates and [[micro].sub.h] that at high shear rates.
Besides, [DELTA]T/T increases linearly with an increase in the logarithm of the ratio of irreversible strain rates after and before a step change, which means the viscous load component changes in a nonlinear manner with the changes in the strain rate, unlike the Newtonian viscosity. Therefore, the rate-sensitivity coefficient [beta] can represent the characteristics of viscous property.
where [[lambda].sub.t] is the relaxation time and [mu] is the Newtonian viscosity. Equation 8 is similar to the linear Jeffrey's model which can describe linear viscoelastic behavior of viscoelastic materials.
Generally speaking, in this kind of plot, G' is as high as higher the Newtonian viscosity and the shear thinning are.