A third equation relating the logarithm of viscosity to the fifth power of absolute temperature has been shown to apply over the full range of materials, temperatures and viscosities examined. The significance of the constants used in these equations is discussed with respect to their value in ...
A generalized viscosity equation for liquid hydrocarbons: Application to oil-sand bitumens A new method is presented for the correlation and prediction of the effect of temperature on viscosity of liquid hydrocarbons and their mixtures. A one-par... AK Mehrotra - 《Fluid Phase Equilibria》 被引...
Implements Tribology::Lubricant class, along with Ubbelohde-Walther equation, ASTM D2270 viscositytribologyviscosity-temperature-chartsviscosity-calculationlubricantsviscosity-indexastmd2270astmd341ubbelohde-walther UpdatedDec 15, 2017 Perl Load more…
A new empirical relation between liquid dynamic viscosity, temperature, and chemical constitution of organic compounds is proposed. The method is based on the De Guzman-Andrade equation and the introduction of a new property, the equivalent chain length of a compound, defined as the chain length ...
Density of the melts with the fluxes was also determined, showing that similar obvious variations of density and its temperature dependence were observed. In terms of the Stokes-Einstein equation and the estimated volumes of the flow units in the melt, the role of NaF and Na O fluxes on the...
When the fictive temperature equals the actual temperature, a linear relation exists between the cooling rate and the Maxwell relaxation rate, the slope of which depends on the fragility of the glass melts. The Avramov equation is extended to describe the cooling rate dependence of the fictive ...
In many cases it is only possible to calculate or to measure some macroscopic properties of fluids (pressure, temperature, molar volume, heat capacities...). The ideal gas "law," PV = nRT, was one of the first important correlations of properties and the deviations from this law for real...
Low-temperature divergence of the charge-density-wave viscosity in ${\\mathrm{K}}_{0.30}$${\\mathrm{MoO}}_{3}$, (${\\mathrm{TaSe}}_{4}$${)}_{2}$I, and ${\\mathrm{TaS}}_{3}$ We have measured the temperature dependence of the low-field, linear conductivity and the high-...
This equation is called the viscosity law of Newton. The velocity gradient, du/dy, is also often called the shear rate. As mentioned earlier, for equal pressure and temperature, the viscosity is constant. This means that Newtonian fluids do not have a memory for deformation in the past. 10....
The influence of temperature and composition on the viscosity of high-purity liquid metals and alloys of the Pb-Sn and Sb-Cd systems was investigated by the logarithmic-decrement method. The variation of viscosity with temperature above the liquidus followed the equation: η = Ae E/RT . No la...