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Title: Invisible Anchors Trap Particles in Branching Junctions

Abstract

Here, 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. Lastly, from a stability analysis, we identify the parameter region of particle sizes and densities where capture due to anchors occurs.

Authors:
 [1]; ORCiD logo [2];  [2];  [1]
  1. ETH Zürich (Switzerland). Institute for Mechanical Systems, Department of Mechanical and Process Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computational Sciences and Engineering Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1474580
Grant/Contract Number:  
[AC05-00OR22725]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
[ Journal Volume: 121; Journal Issue: 5]; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Oettinger, David, Ault, Jesse T., Stone, Howard A., and Haller, George. Invisible Anchors Trap Particles in Branching Junctions. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.121.054502.
Oettinger, David, Ault, Jesse T., Stone, Howard A., & Haller, George. Invisible Anchors Trap Particles in Branching Junctions. United States. doi:10.1103/PhysRevLett.121.054502.
Oettinger, David, Ault, Jesse T., Stone, Howard A., and Haller, George. Fri . "Invisible Anchors Trap Particles in Branching Junctions". United States. doi:10.1103/PhysRevLett.121.054502. https://www.osti.gov/servlets/purl/1474580.
@article{osti_1474580,
title = {Invisible Anchors Trap Particles in Branching Junctions},
author = {Oettinger, David and Ault, Jesse T. and Stone, Howard A. and Haller, George},
abstractNote = {Here, 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. Lastly, from a stability analysis, we identify the parameter region of particle sizes and densities where capture due to anchors occurs.},
doi = {10.1103/PhysRevLett.121.054502},
journal = {Physical Review Letters},
number = [5],
volume = [121],
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 4 works
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