Alkali-metal liquid and vapor thermophysical properties

Vargaftik, N. B.; Yargin, V. S.

doi:10.1007/bf00870239

Cited by 6 publications

(24 citation statements)

References 7 publications

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“…Our calculated critical exponent for cesium is 0.93, which is very close to the experimental value, 0.9. , Deviation of critical exponent from unity shows a nonclassical critical behavior for fluid cesium, which is in agreement with experiment, with previous theoretical predictions. , The coexistence curve of cesium is more asymmetric than that of normal fluids. This asymmetry is due to the stronger long-range interactions in cesium, which plays a dominant role on its structure (see Figure ).…”

Section: Resultssupporting

confidence: 88%

“…We have further shown the calculated vapor pressures in Figure and have compared the results with experimental data . Except in the critical region, the calculated vapor pressures agree very well with experimental data.…”

Section: Resultssupporting

confidence: 60%

“…Calculated saturated liquid and vapor densities from our many-body DPD simulations in the grand canonical ensemble (filled circles) compared with experimental data (open circles and open squares). The open (experimental) , and filled (calculated) triangles show the average densities of coexisting liquid and vapor phases. The error bars, calculated within 68% confidence limit, are smaller than the sizes of markers.…”

Section: Resultsmentioning

confidence: 99%

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Metal–Nonmetal Transition in Fluid Cesium: A Many-Body Dissipative Particle Dynamics Simulation Approach

Faramarzi

Mehdipour

2017

J. Chem. Eng. Data

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A many-body dissipative dynamics simulation approach is presented for inclusion of many-body interactions in fluid cesium. Employing this many-body potential, simulations are done, in the grand canonical ensemble, to calculate the vapor−liquid equilibria over a wide range of temperatures (from the melting temperature to the critical temperature). The calculated coexisting liquid and vapor densities and the vapor pressures are in close agreement with experiment. The metal-nonmetal transition is examined in terms of cluster formation in low density cesium with increasing pressure. Our analysis of cluster formation along the critical isotherm shows that at pressures noticeably higher than the critical pressure very large spherical clusters are formed in the simulation box. The cluster sizes decrease with decreasing pressure to the critical pressure. At the critical pressure, only small clusters are seen in the simulation box. The cluster structures also change noticeably as the metal−nonmetal transition approaches. In the metallic state, high-density, spherical clusters are formed. Decreasing the pressure to the critical pressure causes rearrangement in the structure of spherical clusters to ellipsoidal (lower density) clusters. In the nonmetallic region, the clusters are very diffuse (low density) and do not have a well-defined structure. Adopting the fraction of cesium atoms involved in clusters larger than a threshold size as the fraction contributing to electrical conductivity, our simulation results well predict a sudden decrease in the electrical conductivity in close agreement with experimental observations.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 60%

Section: Resultsmentioning

confidence: 99%

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Metal–Nonmetal Transition in Fluid Cesium: A Many-Body Dissipative Particle Dynamics Simulation Approach

Faramarzi

Mehdipour

2017

J. Chem. Eng. Data

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“…The transport properties of alkali metals vapor are very important as working fluid in industry 1,2 . The investigation of transport properties of alkali metal vapors is difficult because of high temperatures and low vapor pressure.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand liquid alkali metals are corrosive and thus special technique is required for an accurate measurement. Under these conditions the experimental transport properties of alkali metal vapors in a wide range of temperature are scarce, and therefore, an accurate prediction is valuable for many industrial application 1,3,4 .…”

Section: Introductionmentioning

confidence: 99%

Hard-wall potential function for transport properties of alkali metal vapors

Ghatee

Hosseini

2007

The Journal of Chemical Physics

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This study demonstrates that the transport properties of alkali metals are determined principally by the repulsive wall of the pair interaction potential function. The (hard-wall) for K in the range 700-1500 K, 1.69% for Rb, and 1.75% for Cs in the range 700-2000 K. In the same way, the values of predicted thermal conductivity are in agreement with experiment within 2.78%, 3.25%, and 3.63% for K, Rb, and Cs, respectively. The LJ(15-6) hybrid potential with a hard-wall repulsion character conclusively predicts best transport properties of the three alkali metals vapor.

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Correlations of attainable superheat of fluid alkali metals

Balasubramanian¹

2007

Journal of Nuclear Materials

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Alkali-metal liquid and vapor thermophysical properties

Cited by 6 publications

References 7 publications

Metal–Nonmetal Transition in Fluid Cesium: A Many-Body Dissipative Particle Dynamics Simulation Approach

Metal–Nonmetal Transition in Fluid Cesium: A Many-Body Dissipative Particle Dynamics Simulation Approach

Hard-wall potential function for transport properties of alkali metal vapors

Correlations of attainable superheat of fluid alkali metals

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