Line droplets are sessile droplets with finite length and width. The drops can be represented by assuming two spherical caps at each end and a rectangular part in the middle. This study examines the behavior of the contact line of line droplets with different shapes and aspect ratios as they evaporate. We suggest a new method using the different solid-gas interfacial tensions for dry vs. a previously wet substrate to determine the shape of the droplet during evaporation. The pinning of the contact line of line droplets leads to the outward evaporation-induced flow toward the contact line as previously described for spherical and infinite cylindrical droplets. During the evaporation of these droplets on a surface, it is observed that the contact line at the droplet ends recedes at higher contact angles than droplets with a circular footprint. Furthermore, we find the local evaporation rate at the surface of the droplet and study the internal flow generated as a result of evaporation. The outward flow velocity toward the ends along the droplet is higher compared to the flow velocity toward the sides.
Bazargan, V. and Oveysi, M. (2025). Evaporation of line droplets on a substrate. Amirkabir Journal of Mechanical Engineering, 56(11), 4-4. doi: 10.22060/mej.2025.23387.7752
MLA
Bazargan, V. , and Oveysi, M. . "Evaporation of line droplets on a substrate", Amirkabir Journal of Mechanical Engineering, 56, 11, 2025, 4-4. doi: 10.22060/mej.2025.23387.7752
HARVARD
Bazargan, V., Oveysi, M. (2025). 'Evaporation of line droplets on a substrate', Amirkabir Journal of Mechanical Engineering, 56(11), pp. 4-4. doi: 10.22060/mej.2025.23387.7752
CHICAGO
V. Bazargan and M. Oveysi, "Evaporation of line droplets on a substrate," Amirkabir Journal of Mechanical Engineering, 56 11 (2025): 4-4, doi: 10.22060/mej.2025.23387.7752
VANCOUVER
Bazargan, V., Oveysi, M. Evaporation of line droplets on a substrate. Amirkabir Journal of Mechanical Engineering, 2025; 56(11): 4-4. doi: 10.22060/mej.2025.23387.7752
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