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Heat and mass transport in carbon nantubes
KTH, School of Electrical Engineering (EES), Microsystem Technology (Changed name 20121201).
2010 (English)In: 2010 14th International Heat Transfer Conference: Volume 6, ASME Press, 2010, 487-493 p.Conference paper (Refereed)
Abstract [en]

We have investigated heat and mass transport in singlewalled carbon nanotubes (SWNTs) using molecular dynamics methods. Particular attention was paid on the non-equilibrium dynamics at the interface between SWNT and other materials, which strongly manifests in nanoscale. In the first part, we have investigated the heat transport through the interface between SWNTs and surrounding argon matrices in liquid and solid phases. By analyzing the energy relaxation from SWNT to the matrices using non-stationary molecular dynamics simulations, elastic and inelastic thermal energy transports across the interface were separately quantified. The result reveals that the elastic interaction transports energy much faster than the inelastic one, but carries much smaller energy due to slow intra-SWNT phonon relaxation. In the second part, we have investigated a possibility to utilize nonequilibrium thermal interface to transport water through an SWNT. By applying the longitudinal temperature gradient to the SWNT, it is demonstrated that the water cluster is efficiently driven at average acceleration proportional to the temperature gradient. However, the transport simulations with a junction of two different SWNTs suggest that an angstrom diameter difference may result in a significant drag for small diameter SWNTs.

Place, publisher, year, edition, pages
ASME Press, 2010. 487-493 p.
Keyword [en]
Argon matrices, Elastic interactions, Energy relaxation, Heat transport, Molecular dynamics methods, Molecular dynamics simulations, Nano scale, Non equilibrium, Non-equilibrium dynamics, Nonstationary, Phonon relaxation, Solid phasis, Thermal energy transport, Thermal interfaces, Transport simulation, Water cluster, Heat transfer, Molecular dynamics, Thermal gradients, Phase interfaces
National Category
Other Engineering and Technologies
URN: urn:nbn:se:kth:diva-150288DOI: 10.1115/IHTC14-23115ISI: 000307207400058ScopusID: 2-s2.0-84860507118ISBN: 978-0-7918-4941-5OAI: diva2:742949
2010 14th International Heat Transfer Conference, IHTC 14, 8 August 2010 through 13 August 2010, Washington, DC, United States

QC 20140903

Available from: 2014-09-03 Created: 2014-09-01 Last updated: 2014-09-03Bibliographically approved

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Carlborg, Carl Fredrik
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Microsystem Technology (Changed name 20121201)
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