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 A11: Drops: Wetting and Spreading I
8:00 AM–9:57 AM,
Sunday, November 18, 2018
Georgia World Congress Center
Room: B216
Chair: Satish Kumar, University of Minnesota, Twin Cities
Abstract ID: BAPS.2018.DFD.A11.7
Abstract: A11.00007 : Reversible Motion of a Contact Line*
9:18 AM–9:31 AM
Presenter:
Audrey Profeta
(California State Polytechnic University)
Authors:
Audrey Profeta
(California State Polytechnic University)
Esmeralda Orozco
(California State Polytechnic University)
Juan A. Ortiz Salazar
(California State Polytechnic University)
Jeanette Smit
(California State Polytechnic University)
Brian Kroger
(California State Polytechnic University)
Aidan McGuckin
(California State Polytechnic University)
Dani Medina
(California State Polytechnic University)
Nathan C. Keim
(California State Polytechnic University)
We study the evolution of the liquid-solid-vapor contact line of water held in a narrow gap between two acrylic plates. A syringe pump injects and withdraws a constant, small volume of the water, driving the contact line back and forth repeatedly and changing its shape. We take photos of the contact line after each cycle. Comparing these images to each other, we find that below a critical value of infused volume, after several cycles the contact line reaches a steady state in which it always returns to the same shape, despite depinning and executing many small jumps during its motion. Above that value the shape fluctuates in the steady state. This suggests a transition reminiscent of those seen in other systems including cyclically deformed particle suspensions and solids. We discuss possible explanations in terms of the microscopic dynamics of the contact line.
*This work was supported by NSF Grant 1708870.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.A11.7
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