Water droplet evaporation in varied gravity and electric fields
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Journal ArticleDate:
2024Author:
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Gibbons, M. J., Garivalis, A. I., O'Shaughnessy, S. M., Robinson, A. J., Di Marco, P., Water droplet evaporation in varied gravity and electric fields, npj Microgravity, 10, 1, 2024Abstract:
Sessile water droplet evaporation in varied gravity and electric fields has been experimentally studied.
Specifically, the influences of gravity and electric fields are investigated in the context of the heat flux
distribution beneath the droplets, as well as the droplet mechanics and resulting shapes. Experimental
testing was carried out during a European Space Agency (ESA) Parabolic Flight Campaign (PFC 66).
The droplets tested evaporated with a pinned contact line, a single wettability condition, and varied
droplet volume and substrate heat flux. The peak heat transfer was located at the contact line for all
cases. The peak heat flux, average heat flux, and droplet evaporation rate were shown to vary strongly
with gravity, with higher values noted for hypergravity conditions and lower values in microgravity
conditions. The droplet thermal inertia was shown to play a significant role, with larger droplets taking
more time to reach thermal equilibrium during the parabolic testing period. No significant impact of the
electric field on the droplet evaporation was noted for these test conditions.
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http://people.tcd.ie/oshaugseDescription:
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Author: O'Shaughnessy, Seamus
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Journal ArticleSeries/Report no:
npj Microgravity;10;
1;
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Full text availableDOI:
https://doi.org/10.1038/s41526-024-00396-2ISSN:
2373-8065Metadata
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