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Heat conduction in multifunctional nanotrusses studied using Boltzmann transport equation

Dou, Nicholas G. and Minnich, Austin J. (2016) Heat conduction in multifunctional nanotrusses studied using Boltzmann transport equation. Applied Physics Letters, 108 (1). Art. No. 011902. ISSN 0003-6951. http://resolver.caltech.edu/CaltechAUTHORS:20160119-100115926

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Abstract

Materials that possess low density, low thermal conductivity, and high stiffness are desirable for engineering applications, but most materials cannot realize these properties simultaneously due to the coupling between them. Nanotrusses, which consist of hollow nanoscale beams architected into a periodic truss structure, can potentially break these couplings due to their lattice architecture and nanoscale features. In this work, we study heat conduction in the exact nanotruss geometry by solving the frequency-dependent Boltzmann transport equation using a variance-reduced Monte Carlo algorithm. We show that their thermal conductivity can be described with only two parameters, solid fraction and wall thickness. Our simulations predict that nanotrusses can realize unique combinations of mechanical and thermal properties that are challenging to achieve in typical materials.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1063/1.4939266DOIArticle
http://scitation.aip.org/content/aip/journal/apl/108/1/10.1063/1.4939266PublisherArticle
http://arxiv.org/abs/1510.05715arXivDiscussion Paper
Additional Information:© 2016 AIP Publishing LLC. Received 16 October 2015. Accepted 15 December 2015. Published online 04 January 2016. This work was supported by the Air Force Office of Scientific Research (AFOSR) Multifunctional Materials program under Grant No. FA9550-14-1-0266. The authors thank Lucas Meza and Julia R. Greer for useful discussions.
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Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-14-1-0266
Record Number:CaltechAUTHORS:20160119-100115926
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160119-100115926
Official Citation:Heat conduction in multifunctional nanotrusses studied using Boltzmann transport equation Nicholas G. Dou and Austin J. Minnich Appl. Phys. Lett. 108, 011902 (2016); http://dx.doi.org/10.1063/1.4939266
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63760
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:19 Jan 2016 22:49
Last Modified:19 Jan 2016 22:49

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