Viscosity and conductivity

Saturation and superbeat tables and a diagram to 100 bar, 580 K are given by Reynolds, V C., Theimodynamic Propeities in S.I., Stanford Univ. pubL, 1979 (173 pp.). For material to 10,000 psia, 640 F, see Stewart, R. B., R. T Jacobsen, et al., Theimodynamic Propeiiies of Refiigerants, ASHRAE, Atlanta, GA, 1986 (521 pp-)-For specific beat, thermal conductivity, and viscosity, see Theimophysical Propeiiies of Refiigerants, ASHRAE, 1993. 

For specific heat, thermal conductivity, and viscosity, see Theimophysical Piopeities of Refiigeiants, ASHRAE, 1993. 

The conductivity and viscosity of an ionic liquid is often combined into what is termed Walden s rule [Equation (3.6-4)] [54],... 

Ionic liquid conductivity appears to be most strongly correlated with viscosity (q). Figure 3.6-3 shows a plot of conductivity versus viscosity for the data in Tables 3.6-3-3.6-5. This figure clearly demonstrates an inverse relationship between conductivity and viscosity. 

Ya.B. ZeFdovich, FizGoreniyaVzryva 7 (4), 463-76 (1971) CA 77, 64194 (1972) The influence of turbulence and nonturbulence is examined relative to a proplnt burning in a gas flow. Equations indicate exptl methods for determining the magnitudes of the thermal conductivity and viscosity under turbulent flow, and permit a study of thermal flow distribution and temps in a gas wherein an exothermic chem reaction occurs. Equations for non turbulent conditions can be used to calculate the distance from the surface of the proplnt to the zone of intense chem reaction and establish the relation of bulk burning rate to the vol reaction rate. 

Nusselt and Reynolds numbers are based on the diameter of the heating element, the conductivity and viscosity of the liquid, and the nominal gas velocities. The heat-transfer coefficient is constant for nominal liquid velocities above 10 cm/sec. The results were obtained for Prandtl numbers from 5 to 1200, but no effect of this variation was observed. 

Consider the mass, thermal and momentum balance equations. The key assumption of the present analysis is that the Knudsen number of the flow in the capillary is sufficiently small. This allows one to use the continuum model for each phase. Due to the moderate flow velocity, the effects of compressibility of the phases, as well as mechanical energy, dissipation in the phases are negligible. Assuming that thermal conductivity and viscosity of vapor and liquid are independent of temperature and pressure, we arrive at the following equations ... 

To calculate the flow fields outside the evaporating meniscus we use the onedimensional model, developed by Peles et al. (1998, 2000, 2001). Assuming that the compressibility and the energy dissipation are negligible (a flow with moderate velocities), the thermal conductivity and viscosity are independent of the pressure and temperature, we arrive at the following system of equations ... 

Although the transport properties, conductivity, and viscosity can be obtained quantitatively from fluctuations in a system at equilibrium in the absence of any driving forces, it is most common to determine the values from experiments in which a flux is induced by an external stress. In the case of viscous flow, the shear viscosity r is the proportionality constant connecting the magnitude of shear stress S to the flux of matter relative to a stationary surface. If the flux is measured as a velocity gradient, then... 

The molten salt standard program was initiated at Rensselaer Polytechnic Institute (RPI) in 1973 because of difficulties being encountered with accuracy estimates in the NBS-NSRDS molten salt series. The density, surface tension, electrical conductivity, and viscosity of KNO3 and NaCl were measured by seven laboratories over the world using samples distributed by RPI. The data from these round-robin measurements of raw properties were submitted to RPI for evaluation. Their recommendations are summarized in Table 2. 

Janz, G. J., Thermodynamic and Transport Properties for Molten Salts Correlation Equations for Critically Evaluated Density, Surface Tension, Electrical Conductance, and Viscosity Data. 1988, New York American Institute of Physics. 

Transport properties of liquid 4He thermal conductivity and viscosity... 

As the 0L0A-1200 contentrof these dispersions increased it should be remembered that the steric barrier is well-developed at 1% and optimum at about 2% OLOA-1200, as evidenced by the conductivity and viscosity measurements of Figures 8 and 13. 

Glass-Forming Liquids II. Detailed Comparison of Dielectric Relaxation, DC-Conductivity and Viscosity Data. 

Tables and correlating equations for density, vapor pressure, thermal conductivity and viscosity of binary and ternary solutions...

Key material properties for SOFC, such as the ionic conductivity as a function of temperature, are available in refs 36—39. In addition, Todd and Young ° compiled extensive data and presented estimation methods for the calculation of diffusion coefficients, thermal conductivities, and viscosities for both pure components and mixtures of a wide variety of gases commonly encountered in SOFCs. Another excellent source of transport properties for gases and mixtures involved in a SOFC is the CHEMKIN thermodynamic database. ... 

J. Allouche, E. Tyrode, V. Sadtler, L. Choplin, and J.L. Salager Simultaneous Conductivity and Viscosity Measurements as a Technique to Track Emulsion Inversion by the Phase-Inversion-Temperature Method. Langmuir 20, 2134 (2004). 

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