Evaporation of pure and binary droplets on curved substrates

Gurrala, Pradeep and Balusamy, Saravanan and Banerjee, Sayak and Sahu, Kirti Chandra (2022) Evaporation of pure and binary droplets on curved substrates. International Journal of Heat and Mass Transfer, 196. p. 123212. ISSN 0017-9310

[img] Text
International_Journal_of_Heat_and_Mass_Transfer.pdf - Published Version
Restricted to Registered users only

Download (4MB) | Request a copy


We investigate the evaporation of pure ethanol, water and ethanol-water binary sessile droplets on one-dimensional cylindrical substrates using shadowgraphy and infrared imaging techniques. Our results demonstrate that pure ethanol has a greater spread and a smaller contact angle on curved substrates, whereas pure water and binary droplets exhibit a smaller spread on the curved substrates. The top views of the droplet taken using the infrared imaging system demonstrate that a pure ethanol droplet does not preserve a spherical cap profile on the curved substrate, whereas a binary mixture does, which explains the difference in wetting dynamics on curved and flat substrates. Moreover, three-dimensional solid modelling is conducted to obtain the evolution of the morphology of the pure and binary droplets during evaporation. For all binary compositions, we observe that the droplet perimeter remains constant on flat and curved substrates, resulting in identical overall evaporation times on flat and curved substrates. © 2022 Elsevier Ltd

[error in script]
IITH Creators:
IITH CreatorsORCiD
Banerjee, Sayakhttps://orcid.org/0000-0002-9595-6456
Sahu, Kirti Chandrahttp://orcid.org/0000-0002-7357-1141
Item Type: Article
Additional Information: KCS acknowledged the financial support from Science & Engineering Research Board, India through the grant number: CRG/2020/000507.
Uncontrolled Keywords: Binary mixture; Curve substrate; Evaporation; Infrared imaging; Shadowgraphy
Subjects: Physics > Mechanical and aerospace
Chemical Engineering
Divisions: Department of Chemical Engineering
Department of Mechanical & Aerospace Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 21 Jul 2022 10:03
Last Modified: 21 Jul 2022 10:03
URI: http://raiith.iith.ac.in/id/eprint/9846
Publisher URL: http://doi.org/10.1016/j.ijheatmasstransfer.2022.1...
OA policy: https://v2.sherpa.ac.uk/id/publication/12571
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 9846 Statistics for this ePrint Item