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Heat Transfer Research
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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v34.i7-8.140
12 pages

Study of Unsteady Evaporation-Condensation Processes on the Surface by the Methods of the Molecular-Kinetic Theory

Alexei P. Kryukov
Moscow Power Engineering Institute, Moscow, Krasnokazarmennaya 14, 111250, Russia
Irina N. Shishkova
Low Temperature Departments, Centre of High Technologies, Moscow Power Engineering Institute, Krasnokazarmennaya, 14, Moscow 111250, Russia
Arseniy K. Yastrebov
National Research University “MPEI”, Moscow, Russia

ABSTRAKT

The process of unsteady evaporation have been studied by direct numerical solution of the kinetic Boltzmann equation. The results of calculation of vapor flows are illustrated by dependences of density on coordinate at different time moments. It has been shown that a system of waves appears in the vapor phase. The first wave moves with supersonic velocity and can be described by the Rankine-Hugoniot correlation. Calculations have been made for initial data of Onishi and Tsuji who studied the unsteady evaporation-condensation process by solving the model BGK-type equation. Also Furukawa and Murakami experimental investigation of unsteady superfluid-helium evaporation has been modeled. The solution presented agrees with the results of these papers.


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