Dual residence time for droplet to coalesce with liquid surface
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866909217426767872 |
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| author | Hsieh, Ting-Heng Li, Wei-Chi Hong, Tzay-Ming |
| author_facet | Hsieh, Ting-Heng Li, Wei-Chi Hong, Tzay-Ming |
| contents | When droplets approach a liquid surface, they have a tendency to merge in order to minimize surface energy. However, under certain conditions, they can exhibit a phenomenon called coalescence delay, where they remain separate for tens of milliseconds. This duration is known as the residence time or the non-coalescence time. Surprisingly, under identical parameters and initial conditions, the residence time for water droplets is not a constant value but exhibits dual peaks in its distribution. In this paper, we present the observation of the dual residence times through rigorous statistical analysis and investigate the quantitative variations in residence time by manipulating parameters such as droplet height, radius, and viscosity. Theoretical models and physical arguments are provided to explain their effects, particularly why a large viscosity or/and a small radius is detrimental to the appearance of the longer residence time peak. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_12695 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Dual residence time for droplet to coalesce with liquid surface Hsieh, Ting-Heng Li, Wei-Chi Hong, Tzay-Ming Fluid Dynamics Soft Condensed Matter When droplets approach a liquid surface, they have a tendency to merge in order to minimize surface energy. However, under certain conditions, they can exhibit a phenomenon called coalescence delay, where they remain separate for tens of milliseconds. This duration is known as the residence time or the non-coalescence time. Surprisingly, under identical parameters and initial conditions, the residence time for water droplets is not a constant value but exhibits dual peaks in its distribution. In this paper, we present the observation of the dual residence times through rigorous statistical analysis and investigate the quantitative variations in residence time by manipulating parameters such as droplet height, radius, and viscosity. Theoretical models and physical arguments are provided to explain their effects, particularly why a large viscosity or/and a small radius is detrimental to the appearance of the longer residence time peak. |
| title | Dual residence time for droplet to coalesce with liquid surface |
| topic | Fluid Dynamics Soft Condensed Matter |
| url | https://arxiv.org/abs/2308.12695 |