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.A11.3
Abstract: A11.00003 : Sticky Slippy Hemi-solids*
8:26 AM–8:39 AM
Presenter:
Saurabh Nath
(Laboratory PMMH, ESPCI Paris, PSL Research University, France, LadHyX, Ecole polytechnique, Palaiseau, France)
Authors:
Saurabh Nath
(Laboratory PMMH, ESPCI Paris, PSL Research University, France, LadHyX, Ecole polytechnique, Palaiseau, France)
Armelle Keiser
(Laboratory PMMH, ESPCI Paris, PSL Research University, France, LadHyX, Ecole polytechnique, Palaiseau, France)
Christophe Clanet
(Laboratory PMMH, ESPCI Paris, PSL Research University, France, LadHyX, Ecole polytechnique, Palaiseau, France)
David Quéré
(Laboratory PMMH, ESPCI Paris, PSL Research University, France, LadHyX, Ecole polytechnique, Palaiseau, France)
A textured solid infused with a liquid comprises a class of materials in between a liquid and a solid. These hemi-solids may exhibit very little adhesion due to the lack of pinning sites. Here we show that alongside being `slippery’, these surfaces can be `sticky‘ as well. We investigate this by taking an elementary system consisting of a millimetric water droplet placed between two surfaces, infused with oils of different viscosities. We find that if the upper plate viscosity is greater, then by pulling the upper plate at sufficiently high velocities it is possible to detach the droplet completely off the bottom plate. The captured droplet can be subsequently deposited on the lower plate by bringing it in contact and pulling the plates apart slowly. In this talk, we will discuss the physics of such a viscous tweezer and the parameters that govern it.
*Marie Sklodowska-Curie grant (LubISS ITN)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.A11.3
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