How a leak can stop itself
Fuente:
arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866909459187499008 |
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| author | Tally, Caroline D. Kurtz, Heather E. Tchuenkam, Rose B. Friedler, Justyn M. Jensen, Katharine E. |
| author_facet | Tally, Caroline D. Kurtz, Heather E. Tchuenkam, Rose B. Friedler, Justyn M. Jensen, Katharine E. |
| contents | Small fluid leaks are common and frequently troublesome. We often consider how to stop a leak, but here we ask a different question: how might a leak stop itself? We experimentally study leaking flow transitions from continuous drainage to spontaneous arrest. High-speed imaging reveals that fluid breakup events generate droplets whose Laplace pressures oppose the leak. Early droplets grow unstably, allowing the leak to continue, but ultimately a final capping droplet equilibrates to a stable spherical cap via lightly damped harmonic oscillations. A total energetic theory incorporating both the potential and kinetic energy of attempted capping droplets shows that inertia plays a key role in the leak-stop mechanism. Further experiments examining the stability of rivulet flow in such a system demonstrate that a transition from continuous to discrete flow is an essential prerequisite in determining when a leak can stop itself. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2202_02644 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | How a leak can stop itself Tally, Caroline D. Kurtz, Heather E. Tchuenkam, Rose B. Friedler, Justyn M. Jensen, Katharine E. Fluid Dynamics Soft Condensed Matter Small fluid leaks are common and frequently troublesome. We often consider how to stop a leak, but here we ask a different question: how might a leak stop itself? We experimentally study leaking flow transitions from continuous drainage to spontaneous arrest. High-speed imaging reveals that fluid breakup events generate droplets whose Laplace pressures oppose the leak. Early droplets grow unstably, allowing the leak to continue, but ultimately a final capping droplet equilibrates to a stable spherical cap via lightly damped harmonic oscillations. A total energetic theory incorporating both the potential and kinetic energy of attempted capping droplets shows that inertia plays a key role in the leak-stop mechanism. Further experiments examining the stability of rivulet flow in such a system demonstrate that a transition from continuous to discrete flow is an essential prerequisite in determining when a leak can stop itself. |
| title | How a leak can stop itself |
| topic | Fluid Dynamics Soft Condensed Matter |
| url | https://arxiv.org/abs/2202.02644 |