Ring droplet formation during evaporation of a sessile water droplet on a biphilic surface
Journal
International Journal of Heat and Mass Transfer
Journal Volume
182
Date Issued
2022
Author(s)
Abstract
Numerous studies have investigated droplet evaporation on surfaces with different roughness and wettability values. However, most studies have focused on droplet evaporation from homogeneous surfaces at low surface temperatures (below 100 °C). In this study, we conducted droplet evaporation experiments on biphilic surfaces with different ring pattern sizes fabricated by a hybrid method consisting of the sol-gel approach and a picosecond laser system. This study investigated the droplet evaporation boiling phenomenon on these biphilic surfaces under superheated conditions. Changes in droplet geometry and inner bubble dynamics during evaporation were analyzed using a high-speed camera. A ring-shaped droplet formed during the final evaporation period. The formation of the ring enhanced the droplet evaporation efficiency. Furthermore, the experimental results from this study work were compared with the theoretical model proposed in the literature. ? 2021 Elsevier Ltd
Subjects
Drops
High speed cameras
Sol-gels
Droplet evaporation
Droplet formation
Homogeneous surfaces
Hybrid method
Low surface temperature
Pattern size
Ring patterns
Sessile water
Sol-gel approach
Water droplets
Evaporation
SDGs
Type
journal article