Modeling meso- and microstructure in materials patterned with acoustic focusing

We conduct numerical simulations of acoustic focusing in dense suspensions to map the design space of acoustically patterned materials and understand the relationships between input parameters, structural features, and functional properties. We develop closed-form expressions for acoustic forces on...

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Main Authors: Drew S. Melchert, Keith Johnson, Brian Giera, Erika J. Fong, Maxim Shusteff, Julie Mancini, John J. Karnes, Corie L. Cobb, Christopher Spadaccini, Daniel S. Gianola, Matthew R. Begley
Format: Article
Language:English
Published: Elsevier 2021-04-01
Series:Materials & Design
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S0264127521000654
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spelling doaj-5be8903068634896be40b2cb409068672021-03-11T04:23:00ZengElsevierMaterials & Design0264-12752021-04-01202109512Modeling meso- and microstructure in materials patterned with acoustic focusingDrew S. Melchert0Keith Johnson1Brian Giera2Erika J. Fong3Maxim Shusteff4Julie Mancini5John J. Karnes6Corie L. Cobb7Christopher Spadaccini8Daniel S. Gianola9Matthew R. Begley10Materials Department, Engineering II Building 1355, University of California Santa Barbara, Santa Barbara, CA 93106, USA; Corresponding authors.Materials Department, Engineering II Building 1355, University of California Santa Barbara, Santa Barbara, CA 93106, USALawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USALawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USALawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USALawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USALawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USADepartment of Mechanical Engineering, University of Washington, Box 352600, Seattle, WA 98195, USALawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, USAMaterials Department, Engineering II Building 1355, University of California Santa Barbara, Santa Barbara, CA 93106, USA; Corresponding authors.Materials Department, Engineering II Building 1355, University of California Santa Barbara, Santa Barbara, CA 93106, USA; Corresponding authors.We conduct numerical simulations of acoustic focusing in dense suspensions to map the design space of acoustically patterned materials and understand the relationships between input parameters, structural features, and functional properties. We develop closed-form expressions for acoustic forces on particles, enabling rapid simulation of thousands of particles, and find excellent agreement with experimentally focused patterns over a range of conditions. We map the geometrical and microstructural features of focused particle patterns and their dependence on processing parameters. We find that mesostructural geometrical features (focused line height, width, and profile shape) can be controlled reliably over a broad range by modulating input parameters, and that while microstructural features are less readily modulated via input parameters, they are well-suited for various transport properties in functional materials. Notably, packing density nears the random close packing limit at 0.64, and particle contact density shows anisotropy favoring particle contacts along the focused lines. These results guide process design for controlling the properties of patterned materials, and outline the property ranges accessible via acoustic focusing. Additionally, we discuss the dependence of material functionalities, particularly electrical, thermal, and ionic transport properties, on the meso- and micro-structural features of patterned composite materials in the context of acoustic focusing.http://www.sciencedirect.com/science/article/pii/S0264127521000654AcoustophoresisTransportPatterningFunctionalComposite
collection DOAJ
language English
format Article
sources DOAJ
author Drew S. Melchert
Keith Johnson
Brian Giera
Erika J. Fong
Maxim Shusteff
Julie Mancini
John J. Karnes
Corie L. Cobb
Christopher Spadaccini
Daniel S. Gianola
Matthew R. Begley
spellingShingle Drew S. Melchert
Keith Johnson
Brian Giera
Erika J. Fong
Maxim Shusteff
Julie Mancini
John J. Karnes
Corie L. Cobb
Christopher Spadaccini
Daniel S. Gianola
Matthew R. Begley
Modeling meso- and microstructure in materials patterned with acoustic focusing
Materials & Design
Acoustophoresis
Transport
Patterning
Functional
Composite
author_facet Drew S. Melchert
Keith Johnson
Brian Giera
Erika J. Fong
Maxim Shusteff
Julie Mancini
John J. Karnes
Corie L. Cobb
Christopher Spadaccini
Daniel S. Gianola
Matthew R. Begley
author_sort Drew S. Melchert
title Modeling meso- and microstructure in materials patterned with acoustic focusing
title_short Modeling meso- and microstructure in materials patterned with acoustic focusing
title_full Modeling meso- and microstructure in materials patterned with acoustic focusing
title_fullStr Modeling meso- and microstructure in materials patterned with acoustic focusing
title_full_unstemmed Modeling meso- and microstructure in materials patterned with acoustic focusing
title_sort modeling meso- and microstructure in materials patterned with acoustic focusing
publisher Elsevier
series Materials & Design
issn 0264-1275
publishDate 2021-04-01
description We conduct numerical simulations of acoustic focusing in dense suspensions to map the design space of acoustically patterned materials and understand the relationships between input parameters, structural features, and functional properties. We develop closed-form expressions for acoustic forces on particles, enabling rapid simulation of thousands of particles, and find excellent agreement with experimentally focused patterns over a range of conditions. We map the geometrical and microstructural features of focused particle patterns and their dependence on processing parameters. We find that mesostructural geometrical features (focused line height, width, and profile shape) can be controlled reliably over a broad range by modulating input parameters, and that while microstructural features are less readily modulated via input parameters, they are well-suited for various transport properties in functional materials. Notably, packing density nears the random close packing limit at 0.64, and particle contact density shows anisotropy favoring particle contacts along the focused lines. These results guide process design for controlling the properties of patterned materials, and outline the property ranges accessible via acoustic focusing. Additionally, we discuss the dependence of material functionalities, particularly electrical, thermal, and ionic transport properties, on the meso- and micro-structural features of patterned composite materials in the context of acoustic focusing.
topic Acoustophoresis
Transport
Patterning
Functional
Composite
url http://www.sciencedirect.com/science/article/pii/S0264127521000654
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