TY - JOUR
T1 - Invisible Anchors Trap Particles in Branching Junctions
AU - Oettinger, David
AU - Ault, Jesse T.
AU - Stone, Howard A.
AU - Haller, George
N1 - Funding Information:
This work has been partially supported by the Turbulent Superstructures Program of the German National Science Foundation (DFG). The Laboratory Directed Research and Development Program of Oak Ridge National Laboratory is managed by UT-Battelle, LLC, under Contract No.DE-AC05-00OR22725 for the U.S. Department of Energy. The U.S. Government retains, and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript or allows others to do so for U.S. Government purposes.
Funding Information:
We thank Sophie Calabretto and Sascha Hilgenfeldt for the helpful discussions. This work has been partially supported by the Turbulent Superstructures Program of the German National Science Foundation (DFG). The Laboratory Directed Research and Development Program of Oak Ridge National Laboratory is managed by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 for the U.S. Department of Energy. The U.S. Government retains, and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript or allows others to do so for U.S. Government purposes.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/8/3
Y1 - 2018/8/3
N2 - We combine numerical simulations and an analytic approach to show that the capture of finite, inertial particles during flow in branching junctions is due to invisible, anchor-shaped three-dimensional flow structures. These Reynolds-number-dependent anchors define trapping regions that confine particles to the junction. For a wide range of Stokes numbers, these structures occupy a large part of the flow domain. For flow in a V-shaped junction, at a critical Stokes number, we observe a topological transition due to the merger of two anchors into one. From a stability analysis, we identify the parameter region of particle sizes and densities where capture due to anchors occurs.
AB - We combine numerical simulations and an analytic approach to show that the capture of finite, inertial particles during flow in branching junctions is due to invisible, anchor-shaped three-dimensional flow structures. These Reynolds-number-dependent anchors define trapping regions that confine particles to the junction. For a wide range of Stokes numbers, these structures occupy a large part of the flow domain. For flow in a V-shaped junction, at a critical Stokes number, we observe a topological transition due to the merger of two anchors into one. From a stability analysis, we identify the parameter region of particle sizes and densities where capture due to anchors occurs.
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U2 - 10.1103/PhysRevLett.121.054502
DO - 10.1103/PhysRevLett.121.054502
M3 - Article
C2 - 30118271
AN - SCOPUS:85051477335
SN - 0031-9007
VL - 121
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 054502
ER -