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Title: Active mixing of complex fluids at the microscale

Abstract

Mixing of complex fluids at low Reynolds number is fundamental for a broad range of applications, including materials assembly, microfluidics, and biomedical devices. Of these materials, yield stress fluids (and gels) pose the most significant challenges, especially when they must be mixed in low volumes over short timescales. New scaling relationships between mixer dimensions and operating conditions are derived and experimentally verified to create a framework for designing active microfluidic mixers that can efficiently homogenize a wide range of complex fluids. As a result, active mixing printheads are then designed and implemented for multimaterial 3D printing of viscoelastic inks with programmable control of local composition.

Authors:
 [1];  [1];  [1]
  1. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Research Org.:
Harvard Univ., Cambridge, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1347981
Grant/Contract Number:  
SC0001293
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 112; Journal Issue: 40; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; microfluidic mixing; yield stress fluids; 3D printing; graded materials

Citation Formats

Ober, Thomas J., Foresti, Daniele, and Lewis, Jennifer A. Active mixing of complex fluids at the microscale. United States: N. p., 2015. Web. doi:10.1073/pnas.1509224112.
Ober, Thomas J., Foresti, Daniele, & Lewis, Jennifer A. Active mixing of complex fluids at the microscale. United States. https://doi.org/10.1073/pnas.1509224112
Ober, Thomas J., Foresti, Daniele, and Lewis, Jennifer A. Tue . "Active mixing of complex fluids at the microscale". United States. https://doi.org/10.1073/pnas.1509224112. https://www.osti.gov/servlets/purl/1347981.
@article{osti_1347981,
title = {Active mixing of complex fluids at the microscale},
author = {Ober, Thomas J. and Foresti, Daniele and Lewis, Jennifer A.},
abstractNote = {Mixing of complex fluids at low Reynolds number is fundamental for a broad range of applications, including materials assembly, microfluidics, and biomedical devices. Of these materials, yield stress fluids (and gels) pose the most significant challenges, especially when they must be mixed in low volumes over short timescales. New scaling relationships between mixer dimensions and operating conditions are derived and experimentally verified to create a framework for designing active microfluidic mixers that can efficiently homogenize a wide range of complex fluids. As a result, active mixing printheads are then designed and implemented for multimaterial 3D printing of viscoelastic inks with programmable control of local composition.},
doi = {10.1073/pnas.1509224112},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 40,
volume = 112,
place = {United States},
year = {Tue Sep 22 00:00:00 EDT 2015},
month = {Tue Sep 22 00:00:00 EDT 2015}
}

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Cited by: 163 works
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