Stochastic migrations of Marangoni surfers between two lobes of a dumbbell-shaped confinement
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913450855235584 |
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| author | Upadhyaya, Alakesh Akella, VS |
| author_facet | Upadhyaya, Alakesh Akella, VS |
| contents | We report an experimental investigation on the stochastic migration dynamics of Marangoni surfers (camphor-infused paper disks) between the two lobes of a dumbbell-shaped chamber. We characterize the migration dynamics using survival analysis for a given configuration with a unique disk count in each lobe. Qualitatively, all the configurations exhibit stretched exponential decay with time, ascribed to a disk s aging. A given configuration s stability decreases with increasing pairwise interactions. The most stable configuration is always the one with equal partitioning of disks between the lobes, i.e., exactly one-half of disks in each lobe for even-numbered systems but with one extra disk in either of the lobes for odd-numbered systems. Furthermore, we model a camphor disk as a Chiral Active Particle (CAP), as initially proposed by Cruz et al. and show that decreasing motility (or aging) indeed causes the stretched exponential behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_20140 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Stochastic migrations of Marangoni surfers between two lobes of a dumbbell-shaped confinement Upadhyaya, Alakesh Akella, VS Soft Condensed Matter Chemical Physics We report an experimental investigation on the stochastic migration dynamics of Marangoni surfers (camphor-infused paper disks) between the two lobes of a dumbbell-shaped chamber. We characterize the migration dynamics using survival analysis for a given configuration with a unique disk count in each lobe. Qualitatively, all the configurations exhibit stretched exponential decay with time, ascribed to a disk s aging. A given configuration s stability decreases with increasing pairwise interactions. The most stable configuration is always the one with equal partitioning of disks between the lobes, i.e., exactly one-half of disks in each lobe for even-numbered systems but with one extra disk in either of the lobes for odd-numbered systems. Furthermore, we model a camphor disk as a Chiral Active Particle (CAP), as initially proposed by Cruz et al. and show that decreasing motility (or aging) indeed causes the stretched exponential behavior. |
| title | Stochastic migrations of Marangoni surfers between two lobes of a dumbbell-shaped confinement |
| topic | Soft Condensed Matter Chemical Physics |
| url | https://arxiv.org/abs/2407.20140 |