Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability
Post impingement morphology and dynamics of water droplets on convex cylindrical surfaces has been explored experimentally. Droplet impact and post-impact feature studies have been conducted on hydrophillic and superhydrophobic cylindrical surfaces. Effects of the impact Weber number and target-to-d...
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ftdatacite:10.48550/arxiv.1809.08668 2023-05-15T17:39:39+02:00 Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability Khurana, Gargi Sahoo, Nilamani Dhar, Purbarun 2018 https://dx.doi.org/10.48550/arxiv.1809.08668 https://arxiv.org/abs/1809.08668 unknown arXiv https://dx.doi.org/10.1063/1.5064799 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Fluid Dynamics physics.flu-dyn Applied Physics physics.app-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2018 ftdatacite https://doi.org/10.48550/arxiv.1809.08668 https://doi.org/10.1063/1.5064799 2022-04-01T09:16:34Z Post impingement morphology and dynamics of water droplets on convex cylindrical surfaces has been explored experimentally. Droplet impact and post-impact feature studies have been conducted on hydrophillic and superhydrophobic cylindrical surfaces. Effects of the impact Weber number and target-to-drop diameter ratio have been studied. The post-impact hydrodynamics have been quantified using the wetting fraction, the spreading factor and nondimensional film thickness at the north pole of the target. The observations reveal that the wetting fraction and spread factor increases with an increase in the impact We and decrease in the target to drop diameter ratio. An opposite trend is noted for nondimensional film thickness at the targets north pole. It is also deduced that the spread factor is independent of the target wettability. The lamella dynamics post spreading has also been observed to be a strong function of the wettability, impact We and the diameter ratio. An analytical expression for temporal evolution of film thickness at north pole of the cylinderical target is derieved. Another theoretical model based on energy conservation for predicting the maximum wetting fraction for variant cylindrical targets in terms of the governing We and Capillary number and the experimental measurements are in good agreement with the theoretical predictions. Text North Pole DataCite Metadata Store (German National Library of Science and Technology) North Pole |
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Fluid Dynamics physics.flu-dyn Applied Physics physics.app-ph FOS Physical sciences |
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Fluid Dynamics physics.flu-dyn Applied Physics physics.app-ph FOS Physical sciences Khurana, Gargi Sahoo, Nilamani Dhar, Purbarun Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
topic_facet |
Fluid Dynamics physics.flu-dyn Applied Physics physics.app-ph FOS Physical sciences |
description |
Post impingement morphology and dynamics of water droplets on convex cylindrical surfaces has been explored experimentally. Droplet impact and post-impact feature studies have been conducted on hydrophillic and superhydrophobic cylindrical surfaces. Effects of the impact Weber number and target-to-drop diameter ratio have been studied. The post-impact hydrodynamics have been quantified using the wetting fraction, the spreading factor and nondimensional film thickness at the north pole of the target. The observations reveal that the wetting fraction and spread factor increases with an increase in the impact We and decrease in the target to drop diameter ratio. An opposite trend is noted for nondimensional film thickness at the targets north pole. It is also deduced that the spread factor is independent of the target wettability. The lamella dynamics post spreading has also been observed to be a strong function of the wettability, impact We and the diameter ratio. An analytical expression for temporal evolution of film thickness at north pole of the cylinderical target is derieved. Another theoretical model based on energy conservation for predicting the maximum wetting fraction for variant cylindrical targets in terms of the governing We and Capillary number and the experimental measurements are in good agreement with the theoretical predictions. |
format |
Text |
author |
Khurana, Gargi Sahoo, Nilamani Dhar, Purbarun |
author_facet |
Khurana, Gargi Sahoo, Nilamani Dhar, Purbarun |
author_sort |
Khurana, Gargi |
title |
Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
title_short |
Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
title_full |
Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
title_fullStr |
Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
title_full_unstemmed |
Post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
title_sort |
post collision hydrodynamics of droplets on cylindrical bodies of variant convexity and wettability |
publisher |
arXiv |
publishDate |
2018 |
url |
https://dx.doi.org/10.48550/arxiv.1809.08668 https://arxiv.org/abs/1809.08668 |
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op_relation |
https://dx.doi.org/10.1063/1.5064799 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1809.08668 https://doi.org/10.1063/1.5064799 |
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1766140419495690240 |