Speaker
Description
We investigate the shape and diffusion-limited evaporation of a sessile droplet pinned on an inclined solid substrate in the small Bond number regime. The theoretical description is based on an analytical framework that accounts for weak gravity-induced deformation of the droplet interface \cite{timm2019evaporation,popov2005evaporative}. Predicted droplet shapes are quantitatively validated against laboratory measurements over a range of inclination angles, allowing us to assess the validity and range of applicability of the perturbative shape description. On this basis, evaporation is examined by tracking the temporal evolution of the droplet volume and the total evaporation rate and comparing these measurements with model predictions. This work aims to assess the assumptions commonly made in diffusion-limited evaporation models for inclined droplets and to quantify the role of gravity-induced interfacial deformation in the evaporative flux. The results are relevant for multiphase mass transfer processes on inclined substrates, as encountered in porous and engineered surface systems.
| References | [1] Mitchel L Timm, Esmaeil Dehdashti, Amir Jarrahi Darban, and Hassan Masoud. Evaporation of a sessile droplet on a slope. Scientific reports, 9(1):19803, 2019. [2] Yuri O Popov. Evaporative deposition patterns: spatial dimensions of the deposit. Physical Review E—Statistical, Nonlinear, and Soft Matter Physics, 71(3):036313, 2005. |
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| Country | Germany |
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