Bulk condensation in a dusty vapor–gas flow with regard to dust particle size distribution

Kortsenshteyn, N. M.; Yastrebov, A. K.

doi:10.1134/s1061933x16040104

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…According to [9], in describing the kinetics of homogeneous-heterogeneous condensation, it is supposed that the flow contains two groups of particles:…”

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%

“…Similarly to [2], the initial conditions for equations (1) and (2) are specified with respect to the distribution functions in the inlet section, and an assumption is made that heterogeneous condensation nuclei (solid aerosol particles) have the ideal wettability. The assumed polydispersity of heterogeneous condensation results in that the condensation modeling results are overestimated by no more than 10% [9]. Thus, at this stage, a monodisperse approximation was used, as a result of which we have obtained the following expression determining the vapor condensation kinetics on solid aerosol particles:…”

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%

“…The sedimentation process plays the key role in the deposition of aerosols. The sedimentation velocity is written through the Stokes velocity in the following form [13]: (9) where is the aerosol particle diameter, m; is the aerosol particle effective density, kg/m 3 ; g is the acceleration of gravity, m/s 2 ; is the medium dynamic viscosity, N s/m 2 ; χ is the correction coefficient for the aerosol shape (for a sphere χ = 1); and Cn is the Cunningham parameter.…”

Section: Fission Products Transport Modelmentioning

confidence: 99%

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The Impact of Cesium Vapor Bulk Condensation on the Transport of Aerosols in the Reactor Plant’s Primary Circuit during a Severe Accident at a Nuclear Power Plant with VVER

2020

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The article presents the results from numerical modeling of aerosol particles' deposition process during their transportation in the horizontal section of the reactor plant's primary circuit model for the conditions typical for a severe accident at an NPP equipped with VVER reactors. The effect that the bulk condensation of cesium vapors has on the growth and deposition of aerosols during their transportation is analyzed. The influence of the initial size and concentration of aerosol particles on their growth rate and subsequent deposition is considered. Homogeneous condensation occurring in the absence of heterogeneous condensation nuclei (solid aerosol particles) and also heterogeneous condensation under the conditions in which nuclei of the new phase do not emerge according to the homogeneous mechanism are considered as the limit cases. Data on the average size of the produced droplets and aerosol particles along the channel axis in the condensation zone with the varied value of aerosol particles mass fraction in the flow have been obtained, which corresponded to different ratios of the condensate mass fraction in the form of droplets and liquid layer on the surface of solid aerosol particles. It has been established that the general deposition rate decreases if the flow contains droplets generated as a result of homogeneous bulk condensation and having a size smaller than the size of grown aerosol particles. The article describes the analysis scheme of the modeled section whose geometrical shape was specified based on the horizontal section of the experimental installation in the FALCON-ISP1 series of experiments on the deposition and transport of radionuclide aerosols. The cesium vapor homogeneous-heterogeneous condensation process is modeled by numerically solvingusing the method of moments-the kinetic equation for the droplet size distribution function with involvement of the authors' COND-KINET-1 computer program. The transport and deposition of aerosol particles in the primary circuit channel were modeled using the MAVR-TA computer code developed at the National Research Center Kurchatov Institute.

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“…According to [9], in describing the kinetics of homogeneous-heterogeneous condensation, it is supposed that the flow contains two groups of particles:…”

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%

Section: Aerosol Particles' Nucleationmentioning

confidence: 99%

Section: Fission Products Transport Modelmentioning

confidence: 99%

See 1 more Smart Citation

The Impact of Cesium Vapor Bulk Condensation on the Transport of Aerosols in the Reactor Plant’s Primary Circuit during a Severe Accident at a Nuclear Power Plant with VVER

2020

Self Cite

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Numerical simulation of homogeneous-heterogeneous condensation and interphase heat transfer in a dusty vapour-gas flow: Controlling the homogeneous condensation process

Kortsensteyn,

Levashov,

Yastrebov

et al. 2024

International Journal of Thermal Sciences

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Numerical simulation of submicron particles formation during the combustion of coals, taking into account coagulation and dust content of combustion products

Kortsenshteyn

Petrov

2020

J. Phys.: Conf. Ser.

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Homogeneous-heterogeneous bulk condensation of potassium sulfate vapor has been numerically simulated in a dusty vapor-gas flow of coal combustion products upon their cooling along a technological path. A closed model that we have proposed for the formation of submicron particles in coal combustion products has been employed. Data on the concentration of particles formed at varied parameters of heterogeneous condensation sites have been obtained. Variations in the relative contributions of the homogeneous and heterogeneous mechanisms with variations in flow dustiness have been considered. Data on the influence of coagulation processes on the parameters of submicron particles resulting from coal combustion have been presented.

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Bulk condensation in a dusty vapor–gas flow with regard to dust particle size distribution

Cited by 9 publications

References 4 publications

The Impact of Cesium Vapor Bulk Condensation on the Transport of Aerosols in the Reactor Plant’s Primary Circuit during a Severe Accident at a Nuclear Power Plant with VVER

The Impact of Cesium Vapor Bulk Condensation on the Transport of Aerosols in the Reactor Plant’s Primary Circuit during a Severe Accident at a Nuclear Power Plant with VVER

Numerical simulation of homogeneous-heterogeneous condensation and interphase heat transfer in a dusty vapour-gas flow: Controlling the homogeneous condensation process

Numerical simulation of submicron particles formation during the combustion of coals, taking into account coagulation and dust content of combustion products

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