# dynamic viscosity

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## dy·nam·ic vis·cos·i·ty (μ),

the internal or molecular frictional resistance of a fluid by Newton law of viscosity as the ratio of the applied force per unit area to the relative velocity of adjacent fluid layers (produced by the force).
Farlex Partner Medical Dictionary © Farlex 2012
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Notation A: The area of sand subsidence [rho]: Density C: The volume concentration of sand Q: Volume flux d: Diameter of borehole R: Hydraulic radius [h.sub.w]: Head loss Re: Reynolds number [h.sub.f]: Frictional head loss S: Cross-sectional area [h.sub.j]: Local head loss [mu]: Dynamic viscosity J: Hydraulic slope v: Velocity k: Friction coefficient [chi]: Wetted perimeter [k.sub.s]: Roughness height z: Third Cartesian coordinate of cross-sectional area L: The length of circular pipe [lambda]: Flow resistance ratio p: Relative pressure.
Savic, "Mathematical modelling of changing of dynamic viscosity, as a function of temperature and pressure, of mineral oils for hydraulic systems," 6 Facta Universitatis-Series: Mechanical Engineering, vol.
An Ares 2000 Rheometer (TA Instruments) was used to measure the dynamic viscosity. Finally, Fourier transform infrared spectroscopy (FTIR, NICOLET 4700 FTIR, Thermo Electron Corporation) was used to further study the crystallinity degree quantitatively.
For lubricating fluids, heat generated by the internal friction and the corresponding increase in temperature affects the viscosity of the fluid; hence, it may not be realistic to constant function of plastic dynamic viscosity knowing fully well that space-dependent internal heat source is significant.
Additionally, they stated that a higher ethanol mole fraction in the ethanol-water mixture results in a significant lowering of the interaction forces, though by mixing ethanol with water liquid properties such as the density [rho] and the dynamic viscosity [mu] may be changed significantly.
The relation between the bubble radius R and the dynamic viscosity [eta], for the range 2 x [10.sup.-3] < [eta] < 7 x [10.sup.-3] Pa.s .
where [[theta].sub.A] is the advancing dynamic contact angle; [[theta].sub.R] is the receding dynamic contact angle; [[theta].sub.0A] is the equilibrium advancing contact angle; [[theta].sub.0R] is the equilibrium receding contact angle; capillary number, Ca = [mu]U/[sigma], which shows the relative importance of viscous force to capillary force; [mu] is the dynamic viscosity of liquid; U is the liquid contact line velocity; and [sigma] is the surface tension of the liquid mixture.
1 exhibits the variation of dynamic viscosity, versus different compositions of CTAB/SDS at different temperatures.
After 24 hours cooling, the quality of synthesized starch adhesives was ascertained by investigating their physical properties like dynamic viscosity, surface tension, and density.
Embryo culture medium properties were assumed to be those of liquid water, (density [rho] = 998.2 kg/[m.sup.3] and dynamic viscosity [mu] = 0.001003 kg/(m x s)).
Dynamic viscosity was calculated using the following formula:

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