2022
DOI: 10.48550/arxiv.2202.08630
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Interfacial activity dynamics of confined active droplets

Abstract: Oil droplets in aqueous surfactant solution show spontaneous self-propulsion and dynamics ranging from straight-line to unsteady motion with increasing Péclet number. Recent studies have shown that products of interfacial activity (oil-filled micelles) can lead to multistable higher-mode flow fields and chemorepulsive phenomena. To investigate such chemodynamic effects, we have studied disk-like flattened droplets that are pinned at the top and bottom of the reservoir and produce only pumping flow. With increa… Show more

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Cited by 2 publications
(3 citation statements)
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“…3A). Experimentally, such states may be accessed via tuning of the monomer propulsion [13,36] and developing the full theoretical framework for such dynamics is a future challenge.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…3A). Experimentally, such states may be accessed via tuning of the monomer propulsion [13,36] and developing the full theoretical framework for such dynamics is a future challenge.…”
Section: Discussionmentioning
confidence: 99%
“…The hydrodynamic flow fields around the oil droplet microswimmer (Fig. 1A, Supplementary Video SV1) depend in tunable ways on geometric and chemical conditions [34][35][36]. In addition to the hydrodynamic flows, these microswimmers leave a trail of chemical fields [12] comprised of oil-filled surfactant micelles formed by the transfer of oil molecules into empty surfactant micelles (Fig.…”
Section: Freely Jointed Active Polymers Of Self-propelling Emulsion D...mentioning
confidence: 99%
“…Similar to the case of a passive compound particle, the presence of confining drop induces four circulations inside the droplet due to the velocity field of a force dipole (B 2 mode). 55,56 Furthermore, the force dipole's extensional axis is orthogonal to the squirmer's orientation vector. Therefore, the droplet interface gets stretched perpendicular to the orientation vector and compressed in the direction of the orientation vector resulting in a prolate shape of the confining interface.…”
Section: Sub-problem 2: Active Compound Particle In a Quiescent Fluidmentioning
confidence: 99%