Motion and growth of new-phase particles formed in a thermodiffusion chamber

Vítovec, J.; Pavlyukevich, N. V.; Smolik, I.; Фисенко, С. П.

doi:10.1007/bf00870434

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…The effect of release of latent heat of phase transition, and subsequent decreasing of supersaturation is an obvious one. The convergence of curves 2 and 4 is the manifestation of one of the effects of growth droplets at diffusion regime, discovered [21].…”

Section: Simulation Resultsmentioning

confidence: 98%

Heat and mass transfer and condensation interference in a laminar flow diffusion chamber

Фисенко

Brin

2006

International Journal of Heat and Mass Transfer

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Section: Simulation Resultsmentioning

confidence: 98%

Heat and mass transfer and condensation interference in a laminar flow diffusion chamber

Фисенко

Brin

2006

International Journal of Heat and Mass Transfer

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“…If Kn v Ӷ1, the growth is in the continuum or diffusion regime. 19,23,24 Similarly, the motion of droplets is in free molecular regime if Knӷ1, and if KnӶ1, the motion of droplets is in the continuum regime. 24 Table I lists the mean free paths of 1-propanol vapor and He carrier gas over the pressure range of the data from Ref.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Following Vitovec et al, an interpolated expression for these properties with the correct asymptotic values, given by Eq. ͑8͒, has been used: 24 …”

Section: Mathematical Modelmentioning

confidence: 99%

“…If the droplets do not grow to sufficient size before being removed from the vapor by reaching the top or bottom surface of the DCC, then an undercounting of the number of nucleation events may result. 24 In this paper, we present a model of growth and motion of droplets in a DCC to examine the role of carrier gas pressure on the size of droplets in the DCC. The structure of this paper is as follows.…”

Section: Introductionmentioning

confidence: 99%

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The effect of carrier gas pressure on vapor phase nucleation experiments using a thermal diffusion cloud chamber

Kane

Фисенко

Rusyniak

et al. 1999

The Journal of Chemical Physics

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Homogeneous nucleation rate measurements of 1-butanol in helium: A comparative study of a thermal diffusion cloud chamber and a laminar flow diffusion chamberThe effect of carrier gas pressure and wall heating on the operation of the thermal diffusion cloud chamberThe influence of buoyant convection on the operation of the upward thermal diffusion cloud nucleation chamber J. Chem. Phys. 111, 8013 (1999); 10.1063/1.480274Homogeneous nucleation rates of n-pentanol measured in an upward thermal diffusion cloud chamber Recent measurements of critical supersaturations for the vapor phase homogeneous nucleation of several substances using a diffusion cloud chamber technique exhibit a dependence on the pressure of the carrier gas used in the experiments. A model of droplet growth and motion in a diffusion cloud chamber, combined with the density and temperature profiles of the chamber is presented to explain the pressure dependent results. The model demonstrates that at higher carrier gas pressures the growth of the droplets is retarded and the optical scattering signal from the particles is reduced. It is concluded that the observed effect may not result from a pressure dependence of the nucleation rate, but from a pressure dependence of the droplet growth and motion.

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“…A group of researchers associate the in uence of the carrier gas with the transport processes in DCC. Apparently, the simplest and most plausible explanation was proposed in (Vitovec et al 1989;Kane et al 1997), where the effect of the background gas is treated as the in uence of the latter on the further growth of a previously formed critical nucleus. Thus the idea of that work is that at higher carrier gas pressures the growth of droplets is retarded and particles may not grow large enough to be detected by visual methods.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Model of Effect of a Carrier Gas on Nucleation in a Diffusion Chamber

Itkin¹

2001

Aerosol Science and Technology

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For the rst time a model of nucleation when a transport of condensing molecules to the cluster surface is determined by their diffusion through a carrier gas is proposed. The approach in use is strongly based on the microscopic theory of nucleation put forward by the author and allows an analytical representation of the cluster's concentrations through supersaturation, gas temperature, and carrier gas pressure, which is quite new. It is shown that usual conditions of experiments in diffusion cloud chambers meet the requirements of the model validity that means this model can be used to explain a mechanism of the carrier gas pressure in uence on the nucleation kinetics observed in experiments.

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Motion and growth of new-phase particles formed in a thermodiffusion chamber

Cited by 8 publications

References 4 publications

Heat and mass transfer and condensation interference in a laminar flow diffusion chamber

Heat and mass transfer and condensation interference in a laminar flow diffusion chamber

The effect of carrier gas pressure on vapor phase nucleation experiments using a thermal diffusion cloud chamber

Kinetic Model of Effect of a Carrier Gas on Nucleation in a Diffusion Chamber

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