From bipedal to chaotic motion of chemically fueled partially wetting liquid drops
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909965368688640 |
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| author | Voss, Florian Thiele, Uwe |
| author_facet | Voss, Florian Thiele, Uwe |
| contents | We employ a thermodynamically consistent out-of-equilibrium continuum model to study the motion patterns of partially wetting liquid drops covered by autocatalytically reacting surfactants. When ambient chemostats feed a chemomechanical feedback loop involving a nonlinear reaction network, surface stresses caused by the Marangoni effect and the ensuing hydrodynamic motion, drops show a variety of increasingly complex biomimetic motility modes including shuttling, bipedal, rotational, intermittently chaotic and chaotic motion. We determine the corresponding nonequilibrium phase diagram and show that the complexity of the motion arises from competing length scales. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_14370 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | From bipedal to chaotic motion of chemically fueled partially wetting liquid drops Voss, Florian Thiele, Uwe Adaptation and Self-Organizing Systems Soft Condensed Matter We employ a thermodynamically consistent out-of-equilibrium continuum model to study the motion patterns of partially wetting liquid drops covered by autocatalytically reacting surfactants. When ambient chemostats feed a chemomechanical feedback loop involving a nonlinear reaction network, surface stresses caused by the Marangoni effect and the ensuing hydrodynamic motion, drops show a variety of increasingly complex biomimetic motility modes including shuttling, bipedal, rotational, intermittently chaotic and chaotic motion. We determine the corresponding nonequilibrium phase diagram and show that the complexity of the motion arises from competing length scales. |
| title | From bipedal to chaotic motion of chemically fueled partially wetting liquid drops |
| topic | Adaptation and Self-Organizing Systems Soft Condensed Matter |
| url | https://arxiv.org/abs/2512.14370 |