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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2511.01666 |
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| _version_ | 1866908625336795136 |
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| author | Bratu, Ana-Maria Laplaud, Valentin Garcia, Antoine Josserand, Christophe Drevensek, Stéphanie Duprat, Camille Boudaoud, Arezki |
| author_facet | Bratu, Ana-Maria Laplaud, Valentin Garcia, Antoine Josserand, Christophe Drevensek, Stéphanie Duprat, Camille Boudaoud, Arezki |
| contents | The impact of droplets on concave surfaces is poorly understood, although it is relevant to a mode of dispersal that has evolved independently in several species of plants and fungi. This mode relies on splash-cups, specialized organs that use raindrops to disperse reproductive units away from the parent organism. We investigated the impact of droplets on conical cavities that mimic splash-cups and we found that such impact may lead to the formation of two types of jets, which appear essential for dispersal in nature. We built a minimal kinematic model that explains jet formation, involving the motion of fluid particles along geodesics (shortest paths) on the cone surface and we predicted cone angles that optimize jet formation, consistent with the geometries of natural splash-cups |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_01666 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Geometry-driven jets underlie dispersal of plants and fungi by raindrops Bratu, Ana-Maria Laplaud, Valentin Garcia, Antoine Josserand, Christophe Drevensek, Stéphanie Duprat, Camille Boudaoud, Arezki Fluid Dynamics Biological Physics The impact of droplets on concave surfaces is poorly understood, although it is relevant to a mode of dispersal that has evolved independently in several species of plants and fungi. This mode relies on splash-cups, specialized organs that use raindrops to disperse reproductive units away from the parent organism. We investigated the impact of droplets on conical cavities that mimic splash-cups and we found that such impact may lead to the formation of two types of jets, which appear essential for dispersal in nature. We built a minimal kinematic model that explains jet formation, involving the motion of fluid particles along geodesics (shortest paths) on the cone surface and we predicted cone angles that optimize jet formation, consistent with the geometries of natural splash-cups |
| title | Geometry-driven jets underlie dispersal of plants and fungi by raindrops |
| topic | Fluid Dynamics Biological Physics |
| url | https://arxiv.org/abs/2511.01666 |