Three dimensional contractile droplet under confinement
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866917365413838848 |
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| author | Tiribocchi, Adriano Lauricella, Marco Montessori, Andrea Succi, Sauro |
| author_facet | Tiribocchi, Adriano Lauricella, Marco Montessori, Andrea Succi, Sauro |
| contents | We numerically study the dynamics of a three-dimensional contractile fluid droplet in the bulk and under confinement. We show that varying activity leads to a variety of shapes and motile regimes whose motion is driven by an interplay between spontaneous flows and elasticity. In the bulk the droplet self-propels unidirectionally, acquiring either an almost spherical shape at intermediate activity or a peanut-like geometry for larger values. Under confinement, the droplet exhibits a previously unreported oscillating dynamics characterized by periodic hits against opposite walls of a microchannel while moving forward. These results could be of interest for the study of artificial microswimmers and their biological analogs, such as living cells. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_16408 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Three dimensional contractile droplet under confinement Tiribocchi, Adriano Lauricella, Marco Montessori, Andrea Succi, Sauro Soft Condensed Matter Fluid Dynamics We numerically study the dynamics of a three-dimensional contractile fluid droplet in the bulk and under confinement. We show that varying activity leads to a variety of shapes and motile regimes whose motion is driven by an interplay between spontaneous flows and elasticity. In the bulk the droplet self-propels unidirectionally, acquiring either an almost spherical shape at intermediate activity or a peanut-like geometry for larger values. Under confinement, the droplet exhibits a previously unreported oscillating dynamics characterized by periodic hits against opposite walls of a microchannel while moving forward. These results could be of interest for the study of artificial microswimmers and their biological analogs, such as living cells. |
| title | Three dimensional contractile droplet under confinement |
| topic | Soft Condensed Matter Fluid Dynamics |
| url | https://arxiv.org/abs/2602.16408 |