Nonisothermal effects in the growth of carbon clusters in the gas phase View Full Text


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Article Info

DATE

2009-07

AUTHORS

E. A. Baranyshin, O. G. Penyaz’kov, S. P. Fisenko

ABSTRACT

A numerical investigation of the nonisothermal effects occurring in the process of growth of carbon clusters in the gas phase in the temperature range 2000–3000 K has been carried out. It has been established that these effects are due to the phase-transition latent heat released as a result of the volume condensation of nonequilibrium carbon vapor as well as the convective and radiative cooling of the clusters. It is shown that, under the indicated conditions, the radiative cooling of carbon clusters is the dominant cooling mechanism. A mathematical simulation was carried out for the cases of optically thin and thick layers of a vapor-gas mixture embedded in cold walls. The dependence of the growth and temperature of the carbon clusters on their porosity, the supersaturation of the carbon vapor, and the temperature of the vapor-gas mixture was detected. It has been established that the temperature of the growing carbon clusters can be higher or lower than the temperature of the vapor-gas mixture and the deviation from this temperature can exceed 500 K. The data obtained were compared with the results of experiments on shock tubes. More... »

PAGES

642

References to SciGraph publications

  • 2007. Global Dimming by Air Pollution and Global Warming by Greenhouse Gases: Global and Regional Perspectives in NUCLEATION AND ATMOSPHERIC AEROSOLS
  • 1997-03-01. Radiative cooling of free metal clusters in ZEITSCHRIFT FÜR PHYSIK D ATOMS,MOLECULES AND CLUSTERS
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    http://scigraph.springernature.com/pub.10.1007/s10891-009-0241-6

    DOI

    http://dx.doi.org/10.1007/s10891-009-0241-6

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