Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session ZC27: Geophysical Fluid Dynamics: General
12:50 PM–1:55 PM,
Tuesday, November 21, 2023
Room: 151B
Chair: Tomek Jaroslawski, Stanford Univeristy
Abstract: ZC27.00005 : A geometric mechanism behind sharp crests and scallops in erosion by dissolution*
1:42 PM–1:55 PM
Presenter:
Martin Chaigne
(Matière et Systèmes Complexes, CNRS, Université Paris Cité)
Authors:
Martin Chaigne
(Matière et Systèmes Complexes, CNRS, Université Paris Cité)
Sabrina Carpy
(LPG, Nantes Université, CNRS)
Marion Massé
(LPG, Nantes Université, CNRS)
Julien Derr
(RDP, ENS de Lyon)
Sylvain Courrech du Pont
(MSC, CNRS, Université Paris Cité)
Michael Berhanu
(MSC, CNRS, Université Paris Cité)
By comparing field measurements, numerical models and experiments, we propose a geometric approach to explain the generic emergence of scallops. We first characterize the morphology of scallops found on the walls of a limestone cave, and demonstrate the presence of crests which can be seen as singular structures. Then, we discuss the results of numerical models of interface propagation. They allow us to interpret the appearance of crests and the formation of cellular structures as a direct consequence of the fact that the erosion velocity is always directed along the normal to the interface. Finally, we carry out a simple experiment in which patterns are created by dissolution, on the surface of a block of salt, by a solutal Rayleigh-Bénard instability. In accordance with our model, we report the emergence of a cellular pattern of concavities surrounded by sharp crests, very reminiscent of natural scallops.
*This research was funded by the ANR grants Erodiss ANR-16-CE30-0005 and PhysErosion ANR-22-CE30-0017 as well as the Idex Emergence Grant Riverdiss from the Université Paris Cité.
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