Premium
Dynamic Assembly of Small Parts in Vortex–Vortex Traps Established within a Rotating Fluid
Author(s) -
Lee Taehoon,
Sobolev Yaroslav I.,
Cybulski Olgierd,
Grzybowski Bartosz A.
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201902298
Subject(s) - vortex , fluidics , trapping , mechanics , materials science , hopf bifurcation , colloid , symmetry (geometry) , particle (ecology) , classical mechanics , nanotechnology , physics , bifurcation , condensed matter physics , geometry , aerospace engineering , ecology , chemistry , mathematics , oceanography , nonlinear system , quantum mechanics , geology , engineering , biology
Stable, purely fluidic particle traps established by vortex flows induced within a rotating fluid are described. The traps can manipulate various types of small parts, dynamically assembling them into high‐symmetry clusters, cages, interlocked architectures, jammed colloidal monoliths, or colloidal formations on gas bubbles. The strength and the shape of the trapping region can be controlled by the strengths of one or both vortices and/or by the system's global angular velocity. The system exhibits a range of interesting dynamical behaviors including a Hopf‐bifurcation transition between equilibrium‐point trapping and the so‐called limit cycle in which the particles are confined to circular orbits. Theoretical considerations indicate that these vortex–vortex traps can be further miniaturized to manipulate objects with sizes down to ≈10 µm.