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Общее количество найденных документов : 12
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 1-10    11-12 
1.

Вид документа :
Шифр издания : 53/S 81
Автор(ы) : Baidakov V. G., Protsenko S.P., Chernykh G. G., Boltachev G. Sh.
Заглавие : Statistical substantiation of the van der Waals theory of inhomogeneous fluids
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2002. - Vol.65, №4. - С. 041601-041617
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): lennard-jones fluid--van-der-waals theory --molecular dynamics
Аннотация: Computer experiments on simulation of thermodynamic properties and structural characteristics of a Lennard-Jones fluid in one- and two-phase models have been performed for the purpose of checking the base concepts of the van der Waals theory. Calculations have been performed by the method of molecular dynamics at cutoff radii of the intermolecular potential rc,1=2.6σ and rc,2=6.78σ. The phase equilibrium parameters, surface tension, and density distribution have been determined in a two-phase model with a flat liquid-vapor interface. The strong dependence of these properties on the value of rc is shown. The p,ρ,T properties and correlation functions have been calculated in a homogeneous model for a stable and a metastable fluid. An equation of state for a Lennard-Jones fluid describing stable, metastable, and labile regions has been built. It is shown that at T~1.1 the properties of a flat interface within the computer experimental error can be described by the van der Waals square-gradient theory with an influence parameter κ independent of the density. Taking into account the density dependence of κ through the second moment of the direct correlation function will deteriorate the agreement of the theory with data of computer simulation. The contribution of terms of a higher order than (∇ρ)2 to the Helmholtz free energy of an inhomogeneous system has been considered. It is shown that taking into account terms proportional to (∇ρ)4 leaves no way of obtaining agreement between the theory and simulation data, while taking into consideration of terms proportional to (∇ρ)6 makes it possible to describe with adequate accuracy all the properties of a flat interface in the temperature range from the triple to the critical point
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2.

Вид документа :
Шифр издания : 53/S 81
Автор(ы) : Baidakov V. G., Protsenko S.P., Chernykh G. G., Boltachev G. Sh.
Заглавие : Statistical substantiation of the van der Waals theory of inhomogeneous fluids
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2002. - Vol.65, №4. - С. 041601-041617
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): lennard-jones fluid--van-der-waals theory --molecular dynamics
Аннотация: Computer experiments on simulation of thermodynamic properties and structural characteristics of a Lennard-Jones fluid in one- and two-phase models have been performed for the purpose of checking the base concepts of the van der Waals theory. Calculations have been performed by the method of molecular dynamics at cutoff radii of the intermolecular potential rc,1=2.6σ and rc,2=6.78σ. The phase equilibrium parameters, surface tension, and density distribution have been determined in a two-phase model with a flat liquid-vapor interface. The strong dependence of these properties on the value of rc is shown. The p,ρ,T properties and correlation functions have been calculated in a homogeneous model for a stable and a metastable fluid. An equation of state for a Lennard-Jones fluid describing stable, metastable, and labile regions has been built. It is shown that at T~1.1 the properties of a flat interface within the computer experimental error can be described by the van der Waals square-gradient theory with an influence parameter κ independent of the density. Taking into account the density dependence of κ through the second moment of the direct correlation function will deteriorate the agreement of the theory with data of computer simulation. The contribution of terms of a higher order than (∇ρ)2 to the Helmholtz free energy of an inhomogeneous system has been considered. It is shown that taking into account terms proportional to (∇ρ)4 leaves no way of obtaining agreement between the theory and simulation data, while taking into consideration of terms proportional to (∇ρ)6 makes it possible to describe with adequate accuracy all the properties of a flat interface in the temperature range from the triple to the critical point
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3.

Вид документа : Статья из журнала
Шифр издания : 53/F 52
Автор(ы) : Chzhen G.V., Ermakov G.V., Shilov K.S., Potapov N.V., Zabrodkin V.V.
Заглавие : Filing and Capping of Soft Gelatinous Capsules Olimetin
Место публикации : Khimiko-Farmatsevticheskii Zhurnal. - 1985. - V.19, Is.4. - С. 474-476
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): filing--capping--capsules soft--capsules gelatinous
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4.

Вид документа : Статья из журнала
Шифр издания : 53/F 52
Автор(ы) : Chzhen G.V., Ermakov G.V., Shilov K.S., Potapov N.V., Zabrodkin V.V.
Заглавие : Filing and Capping of Soft Gelatinous Capsules Olimetin
Место публикации : Khimiko-Farmatsevticheskii Zhurnal. - 1985. - V.19, Is.4. - С. 474-476
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): filing--capping--capsules soft--capsules gelatinous
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5.

Вид документа : Статья из журнала
Шифр издания : 53/B 74
Автор(ы) : Boltachev G. Sh., Zubarev N.M., Zubareva O. V.
Заглавие : Space charge influence on the angle of conical spikes developing on a liquid-metal anode
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2008. - Vol. 77, № 5-2. - С. 056607/1-056607/10
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): argon
Аннотация: The influence of the space charge of ions emitted from the surface of a conical spike on its shape has been studied. The problem of the calculation of the spatial distributions of the electric field, ion velocity field, and the space charge density near the cone tip has been reduced to the analysis of a system of ordinary differential equations. As a result of numerical solution of these equations, the criterion for the balance of the capillary and electrostatic forces on the conic surface of a liquid-metal anode has been determined. It has allowed us to relate the electrical current flowing through the system, the applied potential difference, and the cone angle. We have compared the results of our calculations with available experimental data concerning emission from the surface of pure liquid gallium, indium, tin, and some liquid alloys, such as Au+Si, Co+Ge, and Au+Ge. On the basis of the proposed model, explanations have been given for a number of specific features of the emissive behavior of different systems.
\\\\Expert2\\NBO\\Physical Review E\\2008, v.77, N 5, p.056607.pdf
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6.

Вид документа : Статья из журнала
Шифр издания : 53/B 74
Автор(ы) : Boltachev G. Sh., Zubarev N.M., Zubareva O. V.
Заглавие : Space charge influence on the angle of conical spikes developing on a liquid-metal anode
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2008. - Vol. 77, № 5-2. - С. 056607/1-056607/10
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): argon
Аннотация: The influence of the space charge of ions emitted from the surface of a conical spike on its shape has been studied. The problem of the calculation of the spatial distributions of the electric field, ion velocity field, and the space charge density near the cone tip has been reduced to the analysis of a system of ordinary differential equations. As a result of numerical solution of these equations, the criterion for the balance of the capillary and electrostatic forces on the conic surface of a liquid-metal anode has been determined. It has allowed us to relate the electrical current flowing through the system, the applied potential difference, and the cone angle. We have compared the results of our calculations with available experimental data concerning emission from the surface of pure liquid gallium, indium, tin, and some liquid alloys, such as Au+Si, Co+Ge, and Au+Ge. On the basis of the proposed model, explanations have been given for a number of specific features of the emissive behavior of different systems.
\\\\Expert2\\NBO\\Physical Review E\\2008, v.77, N 5, p.056607.pdf
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7.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V.G., Boltachev G.Sh.
Заглавие : Curvature dependence of the surface tension of liquid and vapor nuclei
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 1999. - V.59, N1. - С. 469-475
ББК : 53
Предметные рубрики: ФИЗИКА
\\EXPERT2\NBO\Physical Review E\1999, v.59, N 1, p. p469.pdf
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8.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V.G., Boltachev G.Sh.
Заглавие : Curvature dependence of the surface tension of liquid and vapor nuclei
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 1999. - V.59, N1. - С. 469-475
ББК : 53
Предметные рубрики: ФИЗИКА
\\EXPERT2\NBO\Physical Review E\1999, v.59, N 1, p. p469.pdf
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9.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G.
Заглавие : Transport coefficients and the spinodal of a fluid
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2012. - Vol.86, №2. - С. 021201
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): computer simulation--transport coefficients --lennard-jones
Аннотация: Based on the results of computer simulation of transport coefficients in a Lennard-Jones fluid, it has been shown that in (p,T) coordinates, lines of constant values of coefficients of self-diffusion D and excess shear viscosity Δη extended into the region of superheated liquid and supersaturated vapor have an envelope. Each of the ensembles of such lines is divided into two parts by a critical isoline, where the conditions ϕ=ϕc=const (ϕ=D,Δη) are fulfilled. One part of this ensemble has as an envelope the branch of the spinodal that refers to superheated liquid; the other part has the branch of the spinodal of supersaturated vapor. The critical point of liquid-vapor equilibrium is the cusp of the spinodal, at which the critical isolines have a common tangent line with the spinodal and the binodal. Thus, at the approach to the spinodal, the relations (∂D/∂p)T→∞ and (∂Δη/∂p)T→∞ hold
\\\\Expert2\\nbo\\Physical Review E\\2012, v. 86, p.021201.pdf
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10.

Вид документа : Статья из журнала
Шифр издания : 53/B 16
Автор(ы) : Baidakov V. G.
Заглавие : Transport coefficients and the spinodal of a fluid
Место публикации : Physical Review E: Statistical, Nonlinear, and Soft Matter Physics. - 2012. - Vol.86, №2. - С. 021201
ББК : 53
Предметные рубрики: ФИЗИКА
Ключевые слова (''Своб.индексиров.''): computer simulation--transport coefficients --lennard-jones
Аннотация: Based on the results of computer simulation of transport coefficients in a Lennard-Jones fluid, it has been shown that in (p,T) coordinates, lines of constant values of coefficients of self-diffusion D and excess shear viscosity Δη extended into the region of superheated liquid and supersaturated vapor have an envelope. Each of the ensembles of such lines is divided into two parts by a critical isoline, where the conditions ϕ=ϕc=const (ϕ=D,Δη) are fulfilled. One part of this ensemble has as an envelope the branch of the spinodal that refers to superheated liquid; the other part has the branch of the spinodal of supersaturated vapor. The critical point of liquid-vapor equilibrium is the cusp of the spinodal, at which the critical isolines have a common tangent line with the spinodal and the binodal. Thus, at the approach to the spinodal, the relations (∂D/∂p)T→∞ and (∂Δη/∂p)T→∞ hold
\\\\Expert2\\nbo\\Physical Review E\\2012, v. 86, p.021201.pdf
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 1-10    11-12 
 

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