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Kang, Joo H.
Translational Multiscale Biofluidics Lab (TMB Lab)
Research Interests
  • Biomedical devices, infectious disease, organ-on-a-chip, microfluidics, mechanobiology

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Phase Synchronization of fluid-fluid interfaces as hydrodynamically coupled oscillators

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Title
Phase Synchronization of fluid-fluid interfaces as hydrodynamically coupled oscillators
Author
Um, EujinKim, MinjunKim, HyungsooKang, Joo H.Stone, Howard A.Jeong, Joonwoo
Issue Date
2020-10
Publisher
Nature Publishing Group
Citation
NATURE COMMUNICATIONS, v.11, no.1
Abstract
Hydrodynamic interactions play a role in synchronized motions of coupled oscillators in fluids, and understanding the mechanism will facilitate development of applications in fluid mechanics. For example, synchronization phenomenon in two-phase flow will benefit the design of future microfluidic devices, allowing spatiotemporal control of microdroplet generation without additional integration of control elements. In this work, utilizing a characteristic oscillation of adjacent interfaces between two immiscible fluids in a microfluidic platform, we discover that the system can act as a coupled oscillator, notably showing spontaneous in-phase synchronization of droplet breakup. With this observation of in-phase synchronization, the coupled droplet generator exhibits a complete set of modes of coupled oscillators, including out-of-phase synchronization and nonsynchronous modes. We present a theoretical model to elucidate how a negative feedback mechanism, tied to the distance between the interfaces, induces the in-phase synchronization. We also identify the criterion for the transition from in-phase to out-of-phase oscillations.
URI
https://scholarworks.unist.ac.kr/handle/201301/48324
URL
https://www.nature.com/articles/s41467-020-18930-7
DOI
10.1038/s41467-020-18930-7
ISSN
2041-1723
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BME_Journal Papers
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