Modeling the Evaporation of Drying Sessile Droplets with Buoyancy Driven Internal Convection

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e3sconf_icchmt2021_04013.pdf

Date

2021-05-18

Author

Akdağ, Osman
Akkuş, Yigit
Çetin, Barbaros
Dursunkaya, Zafer

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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.

Subject Keywords

Droplet evaporation, Evaporation modeling, Computational fluid dynamics

URI

https://hdl.handle.net/11511/91583

DOI

https://doi.org/10.1051/e3sconf/202132104013

Conference Name

13th ICCHMT 2021

Collections

Department of Mechanical Engineering, Conference / Seminar

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Citation Formats

O. Akdağ, Y. Akkuş, B. Çetin, and Z. Dursunkaya, “Modeling the Evaporation of Drying Sessile Droplets with Buoyancy Driven Internal Convection,” presented at the 13th ICCHMT 2021, Paris, Fransa, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/91583.