Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session AA04: V: Fluids I
5:00 AM–7:00 AM,
Monday, March 20, 2023
Room: Virtual Room 4
Sponsoring
Unit:
DFD
Chair: Simon Huynh, Brandeis University
Abstract: AA04.00007 : Hysteretic wetting and dewetting of a thin sheet peeling off a liquid interface*
6:12 AM–6:24 AM
Presenter:
Nuoya Zhou
(University of Massachusetts Amherst)
Author:
Nuoya Zhou
(University of Massachusetts Amherst)
Collaborations:
Nuoya Zhou, Deepak Kumar, Benny Davidovitch, Narayanan Menon
Under near-quasistatic conditions, measuring the force of peeling allows us to obtain contact
angles via force balance at various scales, as we have shown in prior work. This configuration
allows us to determine the local wetting angle at the 3-phase contact line between air, water
and sheet, and characterize the time-dependent wetting dynamics with higher temporal and
force resolution than is possible with imaging. In pulling up or pushing down the sheet, we find
that the contact line does not slip until we reach an angle close to the receding or advancing
contact angles, respectively. This point at which slip occurs is reproducible and independent of
velocity, while the final advancing or receding angle has a weak dependence on the speed of
peeling. Beyond this point, there is a steady state characterized by slipping and fluctuations of
the contact line. On stopping the peeling process, the contact angle relaxes very slowly to
equilibrium, with a time dependence that depends on whether the relaxation is from advancing
or receding conditions, also depending weakly on the speed of peeling. Repeated loops of
wetting and dewetting retain details of microscopic noise structure, which we identify as elastic
events occurring due to forcing at the contact line.
*We acknowledge support through NSF DMR 1905698.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700