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Труды сотрудников Института теплофизики УрО РАН
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Общее количество найденных документов : 80
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1.
Инвентарный номер: нет.
   
   A 53

   
    Analysis of the kinetic properties of Nickel-Cobalt alloys at high temperatures [Текст] / O. V. Sadyreva, I. G. Korshunov, Yu. V. Glagoleva, S. G. Taluts, V. F. Polev, V. I. Gorbatov // Fizika Metallov i Metallovedenie. - 2004. - Vol. 98, № 6. - С. 29-32
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
KINETIC PROPERTIES

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2.
Инвентарный номер: нет.
   
   A 53

   
    Analysis of the kinetic properties of Nickel-Cobalt alloys at high temperatures [Текст] / O. V. Sadyreva, I. G. Korshunov, Yu. V. Glagoleva, S. G. Taluts, V. F. Polev, V. I. Gorbatov // Fizika Metallov i Metallovedenie. - 2004. - Vol. 98, № 6. - С. 29-32
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
KINETIC PROPERTIES

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3.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Comparison of Different Approaches to the Determination of the Work of Critical Cluster Formation / V. G. Baidakov, G. Sh. Boltachev, J. W. P. Schmelzer // Journal of Colloid and Interface Sience. - 2000. - Vol. 231, № 2. - С. 312-321
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL CLUSTER -- GIBBS' METHOD -- NUCLEATION RATES
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, the van der Waals-Cahn and Hilliard, and a newly developed modified Gibbs' approach—is given. As a model system for comparison, regular solutions are chosen. In addition to the work of critical cluster formation, the composition of the critical clusters, 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 found, in particular, that, for regular solutions, Tolman's equation cannot serve as a first approximation for the description of the curvature dependence of the surface tension even for large cluster sizes and an alternative formula is developed. It is shown that the latter two mentioned methods of determination of the work of critical cluster formation (the van der Waals-Cahn and Hilliard and the modified Gibbs' approach) lead—at least for the model system considered—to qualitatively and partly quantitatively equivalent results. Nevertheless, differences remain which may lead to quantitative deviations when applied to the determination of the steady-state nucleation rates. The possible origin of such deviations is discussed and some further directions of analysis are anticipated

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4.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Comparison of Different Approaches to the Determination of the Work of Critical Cluster Formation / V. G. Baidakov, G. Sh. Boltachev, J. W. P. Schmelzer // Journal of Colloid and Interface Sience. - 2000. - Vol. 231, № 2. - С. 312-321
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
CRITICAL CLUSTER -- GIBBS' METHOD -- NUCLEATION RATES
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, the van der Waals-Cahn and Hilliard, and a newly developed modified Gibbs' approach—is given. As a model system for comparison, regular solutions are chosen. In addition to the work of critical cluster formation, the composition of the critical clusters, 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 found, in particular, that, for regular solutions, Tolman's equation cannot serve as a first approximation for the description of the curvature dependence of the surface tension even for large cluster sizes and an alternative formula is developed. It is shown that the latter two mentioned methods of determination of the work of critical cluster formation (the van der Waals-Cahn and Hilliard and the modified Gibbs' approach) lead—at least for the model system considered—to qualitatively and partly quantitatively equivalent results. Nevertheless, differences remain which may lead to quantitative deviations when applied to the determination of the steady-state nucleation rates. The possible origin of such deviations is discussed and some further directions of analysis are anticipated

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5.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Surface tension of ethane-methane solutions: 1. Experiment and thermodynamic analysis of the results [Electronic resource] / V. G. Baidakov, A. M. Kaverin, M. N. Khotienkova // Fluid Phase Equilibria. - 2013. - Vol.356. - P90-95. - Bibliogr. : p. 95 (21 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ADSORPTION -- CAPILLARY CONSTANT -- SURFACE TENSION
Аннотация: The paper presents the results of measuring the capillary constant a2 and calculating the surface tension σ of ethane-methane solutions. Experimental data have been obtained in the temperature range from 93.15 to 283.15K at pressures from that of saturated vapors of pure ethane to 4MPa. Equations that approximate the temperature, pressure and concentration dependences of a2 and σ are suggested. The concentration dependence of the surface tension is described in the framework of models of an ideal and a regular solution. The relative adsorption has been calculated

\\\\expert2\\NBO\\Fluid Phase Equilibria\\2013, v.356, p. 90-95.pdf
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6.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    Surface tension of ethane-methane solutions: 1. Experiment and thermodynamic analysis of the results [Electronic resource] / V. G. Baidakov, A. M. Kaverin, M. N. Khotienkova // Fluid Phase Equilibria. - 2013. - Vol.356. - P90-95. - Bibliogr. : p. 95 (21 ref.)
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
ADSORPTION -- CAPILLARY CONSTANT -- SURFACE TENSION
Аннотация: The paper presents the results of measuring the capillary constant a2 and calculating the surface tension σ of ethane-methane solutions. Experimental data have been obtained in the temperature range from 93.15 to 283.15K at pressures from that of saturated vapors of pure ethane to 4MPa. Equations that approximate the temperature, pressure and concentration dependences of a2 and σ are suggested. The concentration dependence of the surface tension is described in the framework of models of an ideal and a regular solution. The relative adsorption has been calculated

\\\\expert2\\NBO\\Fluid Phase Equilibria\\2013, v.356, p. 90-95.pdf
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7.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    The isochoric heat capacity of a metastable Lennard-Jones fluid [Electronic resource] / V. G. Baidakov, S. P. Protsenko, Z. R. Kozlova // Chemical Physics Letters. - 2007. - Vol. 447, № 4-6. - P236-240
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LENNARD-JONES FLUID
Аннотация: The article presents the results of molecular-dynamics calculations of the isochoric heat capacity, cv, and the (p, ?, T) – properties of the Lennard-Jones fluid in the region of liquid–gas phase transition in stable and metastable states. The system under investigation contains 2048 particles, the cut-off radius of the potential is chosen equal to 6.78?. The results of computations of the (p, ?, T) – properties have been used to approximate the location of the spinodal. Values of cv have been determined along the gas and the liquid branches of the spinodal. A thermodynamic relation that determines the value of cv on the spinodal in terms of derivatives with respect to temperature of the entropy, pressure and specific volume along the spinodal has been obtained. It is shown that molecular-dynamics data are in agreement with the results of the thermodynamic analysis.????

\\\\Expert2\\NBO\\Chemical Physics Letters\\2007, v. 447, p.236.pdf
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8.
Инвентарный номер: нет.
   
   B 16

    Baidakov, V. G.
    The isochoric heat capacity of a metastable Lennard-Jones fluid [Electronic resource] / V. G. Baidakov, S. P. Protsenko, Z. R. Kozlova // Chemical Physics Letters. - 2007. - Vol. 447, № 4-6. - P236-240
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
LENNARD-JONES FLUID
Аннотация: The article presents the results of molecular-dynamics calculations of the isochoric heat capacity, cv, and the (p, ?, T) – properties of the Lennard-Jones fluid in the region of liquid–gas phase transition in stable and metastable states. The system under investigation contains 2048 particles, the cut-off radius of the potential is chosen equal to 6.78?. The results of computations of the (p, ?, T) – properties have been used to approximate the location of the spinodal. Values of cv have been determined along the gas and the liquid branches of the spinodal. A thermodynamic relation that determines the value of cv on the spinodal in terms of derivatives with respect to temperature of the entropy, pressure and specific volume along the spinodal has been obtained. It is shown that molecular-dynamics data are in agreement with the results of the thermodynamic analysis.????

\\\\Expert2\\NBO\\Chemical Physics Letters\\2007, v. 447, p.236.pdf
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9.
Инвентарный номер: нет.
   
   B 74

    Boltachev, G. Sh.
    First-order curvature corrections to the surface tension of multicomponent systems / G. Sh. Boltachev, J. W. P. Schmelzer, V. G. Baidakov // Journal of Colloid and Interface Sience. - 2003. - Vol.264, №1. - С. 228-236
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SURFACE TENSION -- PHASE COEXISTENCE -- MULTICOMPONENT SYSTEMS
Аннотация: The dependence of surface tension on curvature is investigated for the case of an equilibrium phase coexistence in multicomponent systems. Employing Gibbs's method of description of heterogeneous systems, an equation is derived to determine the dependence of surface tension on curvature for widely arbitrary paths of variation of the independent thermodynamic parameters. It is supposed hereby merely that the temperature is kept constant and that the variations of the different molar fractions are such that the radius of the dividing surface varies monotonically in dependence on the change of the state parameters of the ambient phase along any of the chosen paths. In the analysis, an approach developed by Blokhuis and Bedeaux for one-component systems is utilized. It relies on the expansion of the surface free energy on curvature of the dividing surface. An equation is derived that connects the first-order correction term in the expansion with the interaction potential of the particles in the multicomponent solution and with the two-particle distribution functions in the planar interfacial layer between the two phases coexisting in equilibrium at planar interfaces. The connection of the first-order curvature correction to the surface tension and the first moment of the pressure tensor at a planar interface is analyzed as well

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10.
Инвентарный номер: нет.
   
   B 74

    Boltachev, G. Sh.
    First-order curvature corrections to the surface tension of multicomponent systems / G. Sh. Boltachev, J. W. P. Schmelzer, V. G. Baidakov // Journal of Colloid and Interface Sience. - 2003. - Vol.264, №1. - С. 228-236
ББК 53
Рубрики: ФИЗИКА
Кл.слова (ненормированные):
SURFACE TENSION -- PHASE COEXISTENCE -- MULTICOMPONENT SYSTEMS
Аннотация: The dependence of surface tension on curvature is investigated for the case of an equilibrium phase coexistence in multicomponent systems. Employing Gibbs's method of description of heterogeneous systems, an equation is derived to determine the dependence of surface tension on curvature for widely arbitrary paths of variation of the independent thermodynamic parameters. It is supposed hereby merely that the temperature is kept constant and that the variations of the different molar fractions are such that the radius of the dividing surface varies monotonically in dependence on the change of the state parameters of the ambient phase along any of the chosen paths. In the analysis, an approach developed by Blokhuis and Bedeaux for one-component systems is utilized. It relies on the expansion of the surface free energy on curvature of the dividing surface. An equation is derived that connects the first-order correction term in the expansion with the interaction potential of the particles in the multicomponent solution and with the two-particle distribution functions in the planar interfacial layer between the two phases coexisting in equilibrium at planar interfaces. The connection of the first-order curvature correction to the surface tension and the first moment of the pressure tensor at a planar interface is analyzed as well

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