Multivariable theory of droplet nucleation in a single-component vapor

Alekseechkin, Nikolay V.

doi:10.1016/j.physa.2014.06.050

Cited by 4 publications

(31 citation statements)

References 37 publications

(63 reference statements)

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“…The nucleus composition does not have time to relax and its systematic deviation from * x occurs in the steady state. The similar effect is the mean steady state overheat of droplets in nonisothermal condensation [1,11,12].…”

Section: Kinetic Limitsmentioning

confidence: 83%

“…Similarly to nonisothermal effect in droplet nucleation [1,11], we can characterize the deviation from the one-dimensional nucleation kinetics by considering the ratio VV D z I…”

Section: Kinetic Limitsmentioning

confidence: 99%

“…Taking into account any phenomenon leads to the appearance of the corresponding variable in the theory and thereby the accuracy of the process description is increased. E.g., the addition of droplet temperature to the theory of vapor condensation and the consideration of heat exchange between the droplet and vapor allow us to calculate nonisothermal effects in nucleation [1,11]. Taking into account surface effects [12,13] essentially advances the theory beyond the CNT approximation.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and kinetics of nucleation in binary solutions

Alekseechkin

2019

Chemical Physics

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A new approach that is a combination of classical thermodynamics and macroscopic kinetics is offered for studying the nucleation kinetics in condensed binary solutions. The theory covers the separation of liquid and solid solutions proceeding along the nucleation mechanism, as well as liquid-solid transformations, e.g., the crystallization of molten alloys. The cases of nucleation of both unary and binary precipitates are considered. Equations of equilibrium for a critical nucleus are derived and then employed in the macroscopic equations of nucleus growth; the steady state nucleation rate is calculated with the use of these equations. The present approach can be applied to the general case of non-ideal solution; the calculations are performed on the model of regular solution within the classical nucleation theory (CNT) approximation implying the bulk properties of a nucleus and constant surface tension. The way of extending the theory beyond the CNT approximation is shown in the framework of the finitethickness layer method. From equations of equilibrium of a surface layer with coexisting bulk phases, equations for adsorption and the dependences of surface tension on temperature, radius, and composition are derived. Surface effects on the thermodynamics and kinetics of nucleation are discussed.

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Section: Kinetic Limitsmentioning

confidence: 83%

“…Similarly to nonisothermal effect in droplet nucleation [1,11], we can characterize the deviation from the one-dimensional nucleation kinetics by considering the ratio VV D z I…”

Section: Kinetic Limitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamics and kinetics of nucleation in binary solutions

Alekseechkin

2019

Chemical Physics

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“…) in Refs. [11][12][13][14] for studying the nucleation of bubbles and droplets in the multivariable approach. The negative term in Eq.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the latter describes the fluctuations of these quantities [11,13]. The kinetic equations, or the equations of motion of a nucleus in the space of its variables [11][12][13][14], describe the coupling between the changes of these quantities and the volume change. The determination of the matrix H in Eq.…”

Section: Introductionmentioning

confidence: 99%