Liquid thermal conductivity

Viscosities, thermal conductivities, liquid density, and pure component heat capacities have been estimated at the temperature and composition in the respective bulk phases. These properties are assumed constant for this example. In view of the small temperature changes that are encountered here, this is a reasonable assumption. 

Superfluid - A fluid with near-zero viscosity and extremely high thermal conductivity. Liquid helium exhibits these properties below 2.186 K (the X point). 

For most materials K 2 X 10 (f5//ci ) and for an upper bound calculation we take f = 1 and 6 = 0.1 cm. Thus, for K to be less than 1 for a good thermally conducting (metallic) liquid, the viscosity (17) must be greater than 10 poise. Likewise, for the nonmetallic less thermally conducting liquids, r must be greater than 10 poise. As an indication of how slow... 

Using dimensionless variables and functions, the governing equations and boundary conditions for the (incompressible but thermally conducting) liquid motion down vertical plane are as follows ... 

King, J. A., Barton, R. L., Hauser, R. A. et al. 2008. Synergistic effects of carbon fillers in electrically and thermally conductive liquid crystal polymer based resins. Polymer Composites 29 421-428. 

The temperature dependence of many properties of methanol has been described in figures, tables, and equations. Plots of vapor pressure, liquid density, liquid heat capacity, vapor heat capacity, heat of vaporization, surface tension, liquid thermal conductivity, vapor thermal conductivity, liquid viscosity, and vapor viscosity against temperature have been given by Yaws [13] and by Flick [14]. Tables of vapor pressure [3,1517], liquid density [3,15,17], liquid volume [16], vapor density [15,17], vapor volume [16], liquid viscosity [15,18], vapor viscosity [15], surface tension [15,19], liquid heat capacity [15,17,20], vapor heat capacity [3,15,17], solid heat capacity [11], liquid thermal conductivity [15,17], vapor thermal conductivity [15], second viral coefficient [16], dielectric constant [21], refractive index [3], and heat of vaporization [16] have also been published. Thermodynamic properties of methanol in the condensed phases have been tabulated by Wilhoit et al. [11], and those in the gas phase have been given by Chao et aL [9]. 

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