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ISSN 打印: 1064-2285
ISSN 在线: 2162-6561

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DOI: 10.1615/HeatTransRes.v38.i8.10
pages 669-682

Special Features of Transfer Processes in an Evaporating Droplet Depending on the Method of Heating

Gintautas U. Miliauskas
Department of Thermal and Nuclear Energy, Kaunas University of Technology, Donelaicio 20, LT-44239 Kaunas, Lithuania
R. V. Montvilas
Kaunas Technological University, Chair of Thermal and Atomic Energy, Kaunas, Lithuania
R. P. Bankauskas
Kaunas Technological University, Chair of Thermal and Atomic Energy, Kaunas, Lithuania
Yu. B. Gudzinskas
Kaunas Technological University, Chair of Thermal and Atomic Energy, Kaunas, Lithuania

ABSTRACT

Variation of the state of the droplets of water and H heptane evaporating in a high-temperature gaseous medium with different methods of their heating is modeled numerically. A conjugate problem of combined heat and mass transfer in the evaporating droplet with radiative-conductive propagation of heat in the droplet is solved. The essence of the investigation technique is in that the iterative scheme of numerical calculation is based on the system of integral equations obtained analytically. The droplet surface temperature is calculated by minimizing the functional, stemming from the condition of balance of energy flows on its surface. Interactions of transfer processes in the droplet and in the gaseous medium, as well as spectral effects when radiation is absorbed by semitransparent liquid are taken into account.


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