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Title: Active Mixing of Disparate Inks for Multimaterial 3D Printing

Journal Article · · Advanced Materials Technologies

3D printing of multimaterial parts relies upon efficient mixing of the ink components and a rapid response to composition changes. However, at low Reynolds numbers and large Peclet numbers, mixing disparate viscosity and density inks poses a challenge. In this study, the performance of active micromixers for disparate non-Newtonian inks is evaluated using both experiments and computational fluid dynamics simulations. The mixing efficiencies are compared with scaling relationships for active micromixers. Using detailed simulation results, multiple factors are identified that can impact the micromixer response time during a composition change. Finally, an active micromixer is proposed and evaluated to efficiently mix arbitrary multimaterial ink compositions and produce fine composition gradients within printed parts.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; AC52‐07NA27344; LLNL‐JRNL‐761112.
OSTI ID:
1608530
Alternate ID(s):
OSTI ID: 1506736
Report Number(s):
LLNL-JRNL-761112; 950167
Journal Information:
Advanced Materials Technologies, Vol. 4, Issue 7; ISSN 2365-709X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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3D Printing of Compositional Gradients Using the Microfluidic Circuit Analogy journal November 2019

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