04/2002; DOI: 10.1021/ja02254a001
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    ABSTRACT: This study is conducted to investigate the roles of capillarity and drainage height on mass transfer phenomena during the VAPEX process in heavy oil reservoirs. A comprehensive experimental study was conducted in two 2-D slab models using Plover Lake oil from west-central Saskatchewan and n-butane as the solvent. This study revealed significant effects of drainage height and capillarity on oil drainage rates in contrast to previous studies conducted at unrealistically high permeabilities (i.e., >200 D). A new correlation was developed to predict the effective diffusion/dispersion coefficient from solvent concentration, drainage height, and total pore surface area of the porous media.
    Energy Sources Part A Recovery Utilization and Environmental Effects 02/2014; 36(3). DOI:10.1080/15567036.2010.540629 · 0.36 Impact Factor
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    ABSTRACT: Tensioned metastable fluids provide a powerful means for low-cost, efficient detection of a wide range of nuclear particles with spectroscopic capabilities. Past work in this field has relied on one-component liquids. Pure liquids may provide very good detection capability in some aspects, such as low thresholds or large radiation interaction cross sections, but it is rare to find a liquid that is a perfect candidate on both counts. It was hypothesized that liquid mixtures could offer optimal benefits and present more options for advancement. However, not much is known about radiation-induced thermal-hydraulics involving destabilization of mixtures of tensioned metastable fluids. This paper presents results of experiments that assess key thermophysical properties of liquid mixtures governing fast neutron radiation-induced cavitation in liquid mixtures. Experiments were conducted by placing liquid mixtures of various proportions in tension metastable states using Purdue's centrifugally-tensioned metastable fluid detector (CTMFD) apparatus. Liquids chosen for this study covered a good representation of both thermal and fast neutron interaction cross sections, a range of cavitation onset thresholds and a range of thermophysical properties. Experiments were devised to measure the effective liquid mixture viscosity and surface tension. Neutron-induced tension metastability thresholds were found to vary non-linearly with mixture concentration; these thresholds varied linearly with surface tension and inversely with mixture vapor pressure (on a semi-log scale), and no visible trend with mixture viscosity nor with latent heat of vaporization.
    Nuclear Engineering and Technology 09/2009; 41(7). DOI:10.5516/NET.2009.41.7.979 · 0.76 Impact Factor
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    ABSTRACT: Densities ρ and viscosities η for the binary mixtures of poly(ethylene glycol) + water, + 1,2-ethanediol, + 1,3-propanediol, + 1,4-butanediol over the entire concentration range were determined at temperatures (298.15 to 308.15) K with 5 K interval. The experimental data were used to calculate the excess molar volume , coefficient of thermal expansion α, excess coefficient of thermal expansion , excess Gibbs free energy of activation , and other activation parameters (i.e., ). The values of excess properties were fitted to Redlich–Kister polynomial equation to estimate the binary coefficients. The excess refractive index and electronic polarizability of PEG + water binary mixtures were also determined from the experimental values of refractive indices. The viscosity data were correlated with Grunberg–Nissan and Tamura–Kurata equations. Moreover, the Prigogine–Flory–Patterson theory has been used to correlate the excess molar volumes of the studied mixtures.
    The Journal of Chemical Thermodynamics 03/2013; 58:340-350. DOI:10.1016/j.jct.2012.11.016 · 2.42 Impact Factor