| * Venue | E C G Sudarshan Hall |
| * Speaker | Venkata Sathish Akella |
| * Title | Stochastic migration dynamics of Marangoni surfers between the two lobes of a dumbbell-shaped confinement |
| Affiliation | IIT Jammu |
| Abstract | 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 of 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. 1 , and show that decreasing motility (or aging) indeed causes the stretched exponential behavior. |
| * Announcement? | None |
| * Refreshments? | Before the event |
| * Honorarium? | None |
| Special Arrangements? | None |
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