Equation of state for compressed liquid alkali metals. Part II

Eslami, Hossein; Sheikh, Setareh; Boushehri, Ali

doi:10.1068/htjr013

Cited by 9 publications

(5 citation statements)

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“…Also the results of Table 3 and Fig. 2 for compressed liquid metals show that the present equation of state works better than our previous one [13] and its accuracy remains good over an extended temperature range. This work shows that the equation of state for ordinary fluids can be extended to include liquid metals.…”

Section: Resultsmentioning

confidence: 66%

“…The equation of state is also employed to calculate the compressed liquid density of metals over a wide pressure range. The results are reported in Table 3 and are compared with our previous calculations [13]. In order to show how the equation of state passes through the experimental points, deviation plots for the saturated liquid density of lithium, potassium, cesium, and mercury are shown in Fig.…”

Section: Resultsmentioning

confidence: 98%

“…There is no need to know the exact potential energy curve for calculation of the temperature-dependent parameters. Although the electrons in metals interact [13]. [12] and mercury [29].…”

Section: Resultsmentioning

confidence: 99%

“…This equation of state has been utilized to predict the volumetric and thermodynamic properties of a wide variety of fluids and fluid mixtures [8][9][10][11]. Previously this equation of state has been applied to liquid alkali metals in saturation [12] and compressed states [13].…”

Section: Introductionmentioning

confidence: 99%

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A perturbed hard-sphere-chain equation of state for liquid metals

Eslami

2005

Journal of Nuclear Materials

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Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 98%

“…There is no need to know the exact potential energy curve for calculation of the temperature-dependent parameters. Although the electrons in metals interact [13]. [12] and mercury [29].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A perturbed hard-sphere-chain equation of state for liquid metals

Eslami

2005

Journal of Nuclear Materials

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“…Of the most conventional methods of prediction one may address to the development of the equations of state and accurate correlation schemes to predict thermodynamic properties [3][4][5][6][7][8]. However, equations of state are not accurate enough to be applicable over a wide range of temperatures.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation of potassium along the liquid-vapor coexistence curve

Eslami

Mozaffari

Moghadasi

2010

JICS

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The applicability of pair potential functions to liquid alkali metals is questionable. On the one hand, some recent reports in the literature suggest the validity of two-parameter pair-wise additive Lennard-Jones (LJ) potentials for liquid alkali metals. On the other hand, there are some reports suggesting the inaccuracy of pair potential functions for liquid metals. In this work, we have performed extensive molecular dynamics simulations of vapor-liquid phase equilibria in potassium to check the validity of the proposed LJ potentials and to improve their accuracy by changing the LJ exponents and taking into account the temperaturedependencies of the potential parameters. We have calculated the orthobaric liquid and vapor densities of potassium using LJ (12-6), LJ (8.5-4) and LJ (5-4), effective pair potential energy functions. The results show that using an LJ (8.5-4) potential energy function with temperature-independent parameters, İ and ı, is inadequate to account for the vapor-liquid coexistence properties of potassium. Taking into account the temperature-dependencies of the LJ parameters, İ(T) and ı(T), we obtained the densities of coexisting liquid and vapor potassium in a much better agreement with experimental data. Changing the magnitude of repulsive and attractive contributions to the potential energy function shows that a two-parameter LJ (5-4) potential can well reproduce the densities of liquid and vapor potassium. The results show that LJ (5-4) potential with temperature-dependent parameters produces the densities of liquid and vapor potassium more accurately, compared to the results obtained using LJ (12-6) and LJ (8.5-4) potential energy functions.

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Correlations of supercritical temperature of fluid alkali metals

Balasubramanian¹

2008

Asia-Pacific J Chem Eng

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The supercritical temperature, the maximum attainable temperature of superheating and the critical compressibility factor of caesium, rubidium and potassium are correlated through the generalised van der Waals equation of state. This three-parameter equation differs from the known van der Waals equation of state by the modified expression for molecular pressure. For caesium, rubidium and potassium, the ratios of the supercritical temperature to the maximum attainable temperature of superheating are estimated. Our estimation results are in agreement with experimental data. It has been established that caesium, rubidium and potassium obey the single-parameter law of corresponding states with the ratio of the supercritical temperature to the maximum attainable temperature of superheating as the thermodynamic similarity parameter. 

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Equation of state for compressed liquid alkali metals. Part II

Cited by 9 publications

References 0 publications

A perturbed hard-sphere-chain equation of state for liquid metals

A perturbed hard-sphere-chain equation of state for liquid metals

Molecular dynamics simulation of potassium along the liquid-vapor coexistence curve

Correlations of supercritical temperature of fluid alkali metals

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