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Общее количество найденных документов : 20
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1.

Вид документа : Статья из журнала
Шифр издания : 53/S 66
Автор(ы) : Skripov V.P., Faizullin M.Z.
Заглавие : Thermodynamic Similarity of Phase-Separating Binary-Liquid Mixtures Having an Upper Critical-Temperature
Место публикации : Journal of Chemical Thermodynamics. - 1989. - V.21, Is.7. - С. 687-700
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): phase-separations
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2.

Вид документа : Статья из журнала
Шифр издания : 53/S 66
Автор(ы) : Skripov V.P., Faizullin M.Z.
Заглавие : Thermodynamic Similarity of Phase-Separating Binary-Liquid Mixtures Having an Upper Critical-Temperature
Место публикации : Journal of Chemical Thermodynamics. - 1989. - V.21, Is.7. - С. 687-700
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): phase-separations
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3.

Вид документа : Статья из журнала
Шифр издания : 53/S 91
Автор(ы) : Sulla I.I., Baidakov V.G.
Заглавие : Liquid-vapor interface in argon-crypton system : 2. Description within Van-der-Waals capillarity theory
Место публикации : Zhurnal Fizicheskoi Khimii. - 1994. - V.68, N1. - С. 67-70
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): interface liquid-vapor--system argon-krypton--argon--ar--krypton--theory van-der-waals--theory capillarity--mixtures--surface tension
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4.

Вид документа : Статья из журнала
Шифр издания : 53/S 91
Автор(ы) : Sulla I.I., Baidakov V.G.
Заглавие : Liquid-vapor interface in argon-crypton system : 2. Description within Van-der-Waals capillarity theory
Место публикации : Zhurnal Fizicheskoi Khimii. - 1994. - V.68, N1. - С. 67-70
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): interface liquid-vapor--system argon-krypton--argon--ar--krypton--theory van-der-waals--theory capillarity--mixtures--surface tension
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5.

Вид документа :
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Kaverin A. M., Boltachev G. Sh.
Заглавие : Experimental investigations of nucleation in helium-oxygen mixtures
Место публикации : Journal of Physical Chemistry B. - 2002. - Vol.106, №1. - С. 167-175
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): supersaturated solutions--homogeneous nucleation--surface tension
Аннотация: The paper presents the results of experimental investigations of nucleation in helium-oxygen gas-filled mixtures. Temperature dependences of the mean lifetime of a mixture in the metastable (superheated) state have been determined, and nucleation rates have been calculated by experiments at fixed pressures of 1.171 and 1.667 MPa and at several values of concentrations. Experimental data are compared with results of the homogeneous nucleation theory in a macroscopic (capillary) approximation and with allowance for the dependence of the properties of nuclei on the curvature of their dividing surface. The size effect of nucleation is taken into account in the framework of the van der Waals, Cahn-Hilliard method. The equation of state of the mixture has been built, and the boundary of stability of homogeneous states, the diffusion spinodal, has been determined. The paper discusses the problems of building a nucleation theory for gas-filled mixtures and states a good agreement between theory and experiment at nucleation rates J similar or equal to 10(7) m(-1) s(-1) when the size effect in nucleation is taken into account
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6.

Вид документа :
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G., Kaverin A. M., Boltachev G. Sh.
Заглавие : Experimental investigations of nucleation in helium-oxygen mixtures
Место публикации : Journal of Physical Chemistry B. - 2002. - Vol.106, №1. - С. 167-175
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): supersaturated solutions--homogeneous nucleation--surface tension
Аннотация: The paper presents the results of experimental investigations of nucleation in helium-oxygen gas-filled mixtures. Temperature dependences of the mean lifetime of a mixture in the metastable (superheated) state have been determined, and nucleation rates have been calculated by experiments at fixed pressures of 1.171 and 1.667 MPa and at several values of concentrations. Experimental data are compared with results of the homogeneous nucleation theory in a macroscopic (capillary) approximation and with allowance for the dependence of the properties of nuclei on the curvature of their dividing surface. The size effect of nucleation is taken into account in the framework of the van der Waals, Cahn-Hilliard method. The equation of state of the mixture has been built, and the boundary of stability of homogeneous states, the diffusion spinodal, has been determined. The paper discusses the problems of building a nucleation theory for gas-filled mixtures and states a good agreement between theory and experiment at nucleation rates J similar or equal to 10(7) m(-1) s(-1) when the size effect in nucleation is taken into account
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7.

Вид документа :
Шифр издания : 53/C 73
Автор(ы) : Skripov P. V., Starostin A.A., Volosnikov D. V., Zhelezny V. P.
Заглавие : Comparison of thermophysical properties for oil/refrigerant mixtures by use of the pulse heating method
Место публикации : International Journal of refrigeration. - 2003. - Vol.26, №6. - С. 721-728
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): refrigerant--lubricant--mixtures
Аннотация: The method of pulse heating for the study of thermophysical properties for oil/refrigerant solutions in a wide temperature range and for monitoring of an actual state of these systems has been developed. The regimes of linear heating and thermostabilization of the superheated probe are applied for solving our task. The objects of study are as follows: synthetic oils Mobil EAL Arctic 22, PLANETELF ACD22, XMPA, and solutions of carbon dioxide in these oils. The upper boundary, with respect to temperature, of the two-phase equilibrium region including the vicinity of the liquid–vapour critical curve of these systems, gas solubility in oils at various temperatures, short-time thermostability, and thermal conductivity of oils are considered. Inclusion of the thermally unstable states of a substance in investigation allows one to essentially extend the set of compared data
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8.

Вид документа :
Шифр издания : 53/S 34
Автор(ы) : Schmelzer J. W. P., Baidakov V. G., Boltachev G. Sh.
Заглавие : Kinetics of boiling in binary liquid–gas solutions: Comparison of different approaches
Место публикации : Journal of Chemical Physics. - 2003. - Vol.119, №12. - С. 6166-6183
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical cluster --gibbs' method--van-der-waals
Аннотация: A comparative analysis of the results of determination of the work of critical cluster formation in nucleation theory for three different methods of evaluation—Gibbs’ method (employing the capillarity approximation), the van der Waals–Cahn and Hilliard and a newly developed modified Gibbs’ approach—is given in application to phase formation in multicomponent systems. As an example, processes of boiling in binary liquid–gas solutions, in particular, in nitrogen–helium mixtures are investigated. In addition to the work of critical cluster formation, the bulk properties of the critical bubbles, their characteristic sizes and the values of the surface tension are determined in dependence on the initial supersaturation in the system or, equivalently, on the size of the critical clusters. It is shown that latter two mentioned methods (the van der Waals–Cahn and Hilliard and the modified Gibbs’ approach) lead, in the determination of the work of critical cluster formation, to qualitatively and widely even quantitatively equivalent results. As one of the more general consequences from the present analysis, it has been proven that the modified Gibbs’ approach represents a highly effective tool for the determination of the work of formation of clusters or bubbles of critical sizes not only for one-component and quasibinary systems, discussed earlier, but for phase formation in multicomponent systems of, in general, arbitrary numbers of components as well. It is shown that the modified Gibbs’ approach is preferable as compared with Gibbs’ original treatment not only due to its advantages with respect to an appropriate determination of the properties of clusters of critical sizes, but also from general theoretical considerations. In the limit of large sizes of the critical clusters, both approaches—Gibbs’ original treatment and the modified or generalized Gibbs’ approach—lead to equivalent results
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9.

Вид документа :
Шифр издания : 53/C 73
Автор(ы) : Skripov P. V., Starostin A.A., Volosnikov D. V., Zhelezny V. P.
Заглавие : Comparison of thermophysical properties for oil/refrigerant mixtures by use of the pulse heating method
Место публикации : International Journal of refrigeration. - 2003. - Vol.26, №6. - С. 721-728
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): refrigerant--lubricant--mixtures
Аннотация: The method of pulse heating for the study of thermophysical properties for oil/refrigerant solutions in a wide temperature range and for monitoring of an actual state of these systems has been developed. The regimes of linear heating and thermostabilization of the superheated probe are applied for solving our task. The objects of study are as follows: synthetic oils Mobil EAL Arctic 22, PLANETELF ACD22, XMPA, and solutions of carbon dioxide in these oils. The upper boundary, with respect to temperature, of the two-phase equilibrium region including the vicinity of the liquid–vapour critical curve of these systems, gas solubility in oils at various temperatures, short-time thermostability, and thermal conductivity of oils are considered. Inclusion of the thermally unstable states of a substance in investigation allows one to essentially extend the set of compared data
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10.

Вид документа :
Шифр издания : 53/S 34
Автор(ы) : Schmelzer J. W. P., Baidakov V. G., Boltachev G. Sh.
Заглавие : Kinetics of boiling in binary liquid–gas solutions: Comparison of different approaches
Место публикации : Journal of Chemical Physics. - 2003. - Vol.119, №12. - С. 6166-6183
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): critical cluster --gibbs' method--van-der-waals
Аннотация: A comparative analysis of the results of determination of the work of critical cluster formation in nucleation theory for three different methods of evaluation—Gibbs’ method (employing the capillarity approximation), the van der Waals–Cahn and Hilliard and a newly developed modified Gibbs’ approach—is given in application to phase formation in multicomponent systems. As an example, processes of boiling in binary liquid–gas solutions, in particular, in nitrogen–helium mixtures are investigated. In addition to the work of critical cluster formation, the bulk properties of the critical bubbles, their characteristic sizes and the values of the surface tension are determined in dependence on the initial supersaturation in the system or, equivalently, on the size of the critical clusters. It is shown that latter two mentioned methods (the van der Waals–Cahn and Hilliard and the modified Gibbs’ approach) lead, in the determination of the work of critical cluster formation, to qualitatively and widely even quantitatively equivalent results. As one of the more general consequences from the present analysis, it has been proven that the modified Gibbs’ approach represents a highly effective tool for the determination of the work of formation of clusters or bubbles of critical sizes not only for one-component and quasibinary systems, discussed earlier, but for phase formation in multicomponent systems of, in general, arbitrary numbers of components as well. It is shown that the modified Gibbs’ approach is preferable as compared with Gibbs’ original treatment not only due to its advantages with respect to an appropriate determination of the properties of clusters of critical sizes, but also from general theoretical considerations. In the limit of large sizes of the critical clusters, both approaches—Gibbs’ original treatment and the modified or generalized Gibbs’ approach—lead to equivalent results
Найти похожие
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