E3S Web Conf.
Volume 321, 2021XIII International Conference on Computational Heat, Mass and Momentum Transfer (ICCHMT 2021)
|Number of page(s)||6|
|Section||Heat and Mass Transfert|
|Published online||11 November 2021|
Modeling the Evaporation of Drying Sessile Droplets with Buoyancy Driven Internal Convection
ASELSAN Inc., 06200, Yenimahalle, Ankara, Turkey
2 Mech. Eng. Dept., İ.D.Bilkent University, 06800 Ankara, Turkey
3 Mech. Eng. Dept., Middle East Technical University,, 06800 Ankara, Turkey
* Corresponding author, Phone: +90(312)5926000-83922, email@example.com
Droplet evaporation is a fundamental phenomenon encountered in diverse applications such as inkjet printing, DNA mapping, film coating, and electronics cooling. Modeling the evaporation process of a sessile droplet is complicated because of the coupling of several physical phenomena occurring in different phases and various magnitudes such as the buoyant convection of the liquid in millimeter size droplets and that of the surrounding air/water vapor mixture, in the order of meters. In this study, the theoretical framework presented previously for the steadily fed droplets [Int J Therm Sci, 158 (2020) 106529] is extended to resolve the evaporation of drying droplets with a pinned contact line. Based on the quasi-steady-state assumption, buoyant convection inside the droplet and diffusive-convective transport of vapor in the gas domain are modeled. As a test case, drying process of a water droplet with a 68° initial contact angle on a heated substrate is simulated and the predictions of the model are interpreted.
Key words: Droplet evaporation / evaporation modeling / computational fluid dynamics
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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