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...
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 ...
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....
awhere v is the kinematic viscosity in centistokes (cSt), and T the temperature in degrees Kelvin. The Walther equation has been shown to accurately capture viscosity versus temperature data for typical mineral oil and synthetic lubricants. It also forms the basis for the American Society for ...
Modified Walter's equation has been found suitable to calculatethe dynamic viscosity at delimited temperatures.P. DaučíkM. HadvinováJ. VišnovskỳSlovnaft VÚRUPPetroleum & Coal
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...
An equation of state for the thermodynamic properties of 1,1,1,2,3,3-hexafluoropropane (R236ea) A new equation of state expressed explicitly in the Helmholtz free energy for the thermodynamic properties of 1,1,1,2,3,3-hexafluoropropane (R236ea) was pr... Xinfang,Rui,and,... - 《...
In this circumstance, an interesting empirical equation correlating the two parameters related to the viscosity Arrhenius-type equation has recently proposed by Messadi et al. for some pure solvents and binary liquid mixtures. This work attempts to extend their equation to ternary liquid systems. ...
The H2 viscosity (μH2) is affected by pressure and temperature, as seen in Fig. 13. At 10 MPa, for example, a rise in μH2 from 9.6×10−3 mPa s to 10.7×10−3mPas was found when the temperature increased from 313 K to 373 K (Fig. 13(a)); at 20 MPa, 30 MPa, 40...