Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session Y55: Shell Buckling II
11:15 AM–1:15 PM,
Friday, March 8, 2019
BCEC Room: 254B
Sponsoring Units: GSNP GSOFT
Chair: Pedro Reis, Ecole polytechnique federale de Lausanne
Abstract: Y55.00002 : Swimming through shell buckling*
11:27 AM–11:39 AM
collapses. It reinflates back when the pressure is decreased. The
hysteresis in shape sequence and in deformation velocity associated
to this cycle makes this simple object a good candidate for becoming a
swimmer able to move at low or high Reynolds number.
We explore this possibility through a macroscopic experiment in fluids
of varying viscosities so as to explore different flow regimes. We
show that not only the shape hysteresis leads to swimming but the fast
buckling phase is an efficient mechanism for propulsion that implies
inertial effects and subtle coupling between shape post-buckling
oscillations and fluid flow patterns. Our modeling shows that such an
inertial regime could even be reached at microscopic scale.
We anticipate that a conveyor made of a few of microbubbles with
different shell thicknesses, would constitute a microrobot whose 3D
displacement can be remotely controlled by ultasounds.
Ref : A. Djellouli, P. Marmottant, H. Djeridi, C. Quilliet and G.
Coupier, PRL 119, 224501 (2017).
*This research was made possible by ERC Grant No. 614655 Bubbleboost.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700