Sessile volatile drop evaporation under microgravity

The evaporation of sessile drops of various volatile and non-volatile liquids, and their internal flow patterns with or without instabilities have been the subject of many investigations. The current experiment is a preparatory one for a space experiment planned to be installed in the European Drawe...

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Bibliographic Details
Published inNPJ microgravity Vol. 6; no. 1; pp. 37 - 8
Main Authors Kumar, Sanjeev, Medale, Marc, Marco, Paolo Di, Brutin, David
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 11.12.2020
Nature Publishing Group
Nature Portfolio
Subjects
639/166/898
639/766/189
Applied Microbiology
Biomechanics
Biomedical and Life Sciences
Biotechnology
Classical and Continuum Physics
Engineering Sciences
Evaporation
Experiments
Fluids mechanics
Immunology
Life Sciences
Mechanics
Microgravity
Reactive fluid environment
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Weightlessness
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Summary:The evaporation of sessile drops of various volatile and non-volatile liquids, and their internal flow patterns with or without instabilities have been the subject of many investigations. The current experiment is a preparatory one for a space experiment planned to be installed in the European Drawer Rack 2 (EDR-2) of the International Space Station (ISS), to investigate drop evaporation in weightlessness. In this work, we concentrate on preliminary experimental results for the evaporation of hydrofluoroether (HFE-7100) sessile drops in a sounding rocket that has been performed in the frame of the MASER-14 Sounding Rocket Campaign, providing the science team with the opportunity to test the module and perform the experiment in microgravity for six consecutive minutes. The focus is on the evaporation rate, experimentally observed thermo-capillary instabilities, and the de-pinning process. The experimental results provide evidence for the relationship between thermo-capillary instabilities and the measured critical height of the sessile drop interface. There is also evidence of the effects of microgravity and Earth conditions on the sessile drop evaporation rate, and the shape of the sessile drop interface and its influence on the de-pinning process.
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ISSN:2373-8065
2373-8065
DOI:10.1038/s41526-020-00128-2