Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session F11: Spreading and Evaporation of Binary Drops
8:00 AM–10:10 AM,
Monday, November 19, 2018
Georgia World Congress Center Room: B216
Chair: Justin Burton, Emory University
Abstract ID: BAPS.2018.DFD.F11.3
Abstract: F11.00003 : Particles disappear, phase segregation is shown*
8:26 AM–8:39 AM
Howard A. Stone
In fluid dynamics, tracer particles are commonly used for flow visualization because many fluids are transparent. In this study, we introduce a unusual experiment where seeded fluorescent polystyrene particles are dissolved at a specific concentration ratio between two liquid components, which we use to identify molecular segregation in a binary mixture droplet during evaporation. This selective evaporation phenomenon has never been observed in experimental results. In addition, we develop a theoretical model in good agreement with the experimental results. We expect that understanding of the evaporation mechanism of a multi-component liquid droplet will provide some insights to construct mixture components depending upon various physicochemical applications, such as ink-jet printing, spray coating, and droplet-based microfluidics for biochemical and biomedical applications.
*H.K. thanks the Settlement Research Funds for newly hired tenure track faculty from KAIST (G04170022) and Acousto-microfluidics Research Center for Next-Generation Healthcare (G04180026) for the financial support to attend the APS DFD 2018 conference.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.F11.3
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