An experimental investigation of the effect of surface roughness on sessile droplet evaporation

Zhang, Zhihao; Yan, Yuying; Magnini, Mirco

Abstract

As one of the most common phenomena in nature, droplet evaporation has become a major heat transfer mode and is used widely in industries and scientific fields. For a sessile droplet, the wettability of the substrate surface could make a significant effect on evaporation dynamics and heat transfer rate. Among many factors influencing surface wettability, surface roughness is one of the common causes, but the link between roughness and the processes of droplet evaporation has not yet been fully revealed. Therefore, an experimental study of sessile nanofluid water droplets located on copper surfaces with different roughness and wettability has been carried out. In the present study, the effect of roughness as a factor on the evaporation rate is considered. The deformation and temperature distribution of the liquid-vapour interface of the sessile droplet are recorded. In addition, the effect of surface roughness on the nanoparticle sedimentary pattern is observed. It has been demonstrated that the changes in surface roughness not only affect the wetting state of the sessile droplet but also have an impact on the heat and mass transfer processes at the liquid-vapour interface. The research in this article aims to recognize the relationship between roughness and droplet evaporation dynamics.

Citation

Zhang, Z., Yan, Y., & Magnini, M. (2023, August). An experimental investigation of the effect of surface roughness on sessile droplet evaporation. Presented at International Heat Transfer Conference 17, Cape Town, South Africa

• Presentation Conference Type: Conference Paper (published)
• Conference Name: International Heat Transfer Conference 17
• Start Date: Aug 14, 2023
• End Date: Aug 18, 2023
• Acceptance Date: Aug 15, 2023
• Online Publication Date: Aug 15, 2023
• Publication Date: Aug 15, 2023
• Deposit Date: Jan 10, 2024
• Publicly Available Date: Jan 10, 2024
• Pages: 1-8
• Series Title: International Heat Transfer Conference 17
• Series ISSN: 2377-424X
• DOI: https://doi.org/10.1615/IHTC17.130-110
• Public URL: https://nottingham-repository.worktribe.com/output/27599260
• Publisher URL: https://ihtcdigitallibrary.com/conferences/ihtc17,724b579b5ffc9ca1,6763bc570c1dbf18.html