DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 42: Turbulence

DY 42.8: Talk

Wednesday, March 14, 2018, 12:00–12:15, BH-N 128

Fluid surface particle control and transition to order in wave-based liquid metamaterialsNicolas Francois1, Hua Xia1, •Horst Punzmann1, Paul Fontana2, and Michael Shats11Research School of Physics and Engineering, Australian National University, Canberra, Australia — 2Physics department, Seattle University, Seattle, USA

This work demonstrates a method of remotely shaping the trajectories of floating particles on a liquid-gas interface through the external control of surface waves. The underlying principle is a combination of rotating waves, created by a superposition of two orthogonal standing waves, and the Lagrangian drift of particles along closed paths in such waves. This mechanism offers a high degree of control over the particle motion and provides the ability to confine particles to a spatially periodic lattice of nested orbits. The key parameter in the transition from ordered to disordered flow (or vice versa) is the temporal phase shift between the two orthogonal standing waves. We present experimental results on the creation and control of such dynamical liquid interface materials, complemented with a theoretical model of particle trajectories based on the wave-driven Lagrangian drift at the surface of an ideal fluid. In analogy of solid metamaterials which guide waves through matter, liquid metamaterials allow the guidance of matter through control of the imposed surface wave topology. By dynamically shaping a fluid interface using rotating waves, it is possible to effectively produce a 2D material with prescribed transport properties [N. Francois, et. al. Nat. Commun. 7, 14325 (2017)].

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin