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Weak evaporation (condensation) with an arbitrary evaporation coefficient in gases with a constant frequency of molecular collisions

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Journal of Engineering Physics and Thermophysics Aims and scope

Abstract

We have obtained an exact solution of the problem on determination of temperature and concentration jumps of a rarefied elementary (monoatomic) gas in the case of weak evaporation from the gas-condensed phase interface into the half-space of a saturated vapor. Use is made of a model kinetic equation with a collision integral in the BGK (Bhatnagar, Gross, and Krook) form. Accurate coefficients of the temperature and concentration jumps are found. It is shown that at low evaporation coefficients the dependence of the concentration of the vapor on its evaporation (concentration) rate at a large distance from the interface is linear even at low (as compared to sonic) vapor velocities.

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Authors and Affiliations

  1. Moscow Pedagogical University, Russia

    A. V. Latyshev & A. A. Yushkanov

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  1. A. V. Latyshev
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  2. A. A. Yushkanov
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 73, No. 3, pp. 542–549, May–June, 2000.

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Latyshev, A.V., Yushkanov, A.A. Weak evaporation (condensation) with an arbitrary evaporation coefficient in gases with a constant frequency of molecular collisions. J Eng Phys Thermophys 73, 528–535 (2000). https://doi.org/10.1007/BF02681794

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  • DOI: https://doi.org/10.1007/BF02681794

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