Study of the Thermodynamic Properties of a Drop in an Environment under Subcritical Conditions During Evaporation

Yendoubouame Lare¹, Koffi Sagna^{1, 2,} , Kodjo S. Apeke³, Dzidula K. Afodanyi², Yendoubé Lare² and Amah S. d’Almeida⁴

¹Department of Physics, Faculty of Sciences, University of Lomé, Lomé, Togo

²Centre d’Excellence Régional pour la Maîtrise de l’Electricité (CERME), University of Lomé, Lomé, Togo

³Ecole Polytechnique de Lomé, University of Lomé, Lomé, Togo

⁴Department of Mathematics, Faculty of Sciences, University of Lomé, Lomé, Togo

Cite this paper:
Yendoubouame Lare, Koffi Sagna, Kodjo S. Apeke, Dzidula K. Afodanyi, Yendoubé Lare and Amah S. d’Almeida. Study of the Thermodynamic Properties of a Drop in an Environment under Subcritical Conditions During Evaporation. International Journal of Physics. 2023; 11(3):97-105. doi: 10.12691/ijp-11-3-1

Abstract

Evaporation of a droplet in hotter environment for the same fluid in subcritical condition has been studied in this work by analyzing the thermodynamic properties. The physical model used is based on Navier-Stokes equations. To simplify the computations, we assumed that the droplet has a spherical symmetry and evolves in quasi steady case and laminar conditions. The study is mainly characterized by the fact that the equation of conservation of momentum is effectively taken into account and that the velocity of the droplet is not always uniform. The analysis of the evolution of temperature, mass flow and velocity in the droplet and in the gaseous phase reveals the presence of discontinuities in the drop towards its boundary and of an unbalanced energy layer attached to the interface when the speed is not uniform in the drop.

Keywords:
Navier-stokes equations evaporation droplet temperature density and velocity

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