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 E07: Microscale Flows: Interfaces
5:10 PM–6:28 PM,
Sunday, November 18, 2018
Georgia World Congress Center
Room: B212
Chair: Thomas Cubaud, Stony Brook University
Abstract ID: BAPS.2018.DFD.E07.3
Abstract: E07.00003 : Thermocapillary flow over superhydrophobic surfaces*
5:36 PM–5:49 PM
Presenter:
Moran Bercovici
(TECHNION)
Authors:
Valeri Frumkin
(TECHNION)
Moran Bercovici
(TECHNION)
We present an experimental realization of thermocapillary flow over a superhydrophobic surfaces subjected to controlled spatial temperature gradients. We demonstrate how a superhydrophobic surface can provide an interface for Marangoni stresses to drive fluid flow, thus allowing for thermocapillarity to be applied to closed fluidic systems lacking a continuous fluid-liquid interface. We show that hierarchical superhydrophobic structures are necessary in order to prevent the Cassie to Wenzel transition, enabling stable flows over long durations of time. Finally, using a Hele-Shaw chamber containing such superhydrophobic surface, we demonstrate the use of localized heating for obtaining desired flow patterns.
*Funded by the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Programme, Grant Agreement No. 678734 (MetamorphChip).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.E07.3
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