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dc.contributor.authorAvanessian, Tadeh
dc.contributor.authorHwang, Gisuk
dc.identifier.citationAvanessian, Tadeh; Hwang, Gisuk. 2018. Thermal switch using controlled capillary transition in heterogeneous nanostructures. International Journal of Heat and Mass Transfer, vol. 121:pp 127-136en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractThe development of a nanoscale thermal switch is a crucial step toward advanced thermal management systems including future thermal logic gates and computers. This study demonstrates a new nanoscale thermal switch mechanism using controlled, morphological transition from adsorption to capillary state in a novel gas-filled nanostructure, i.e., a nanogap with controllable nanoposts on one surface only. The degree of thermal switch, 5, at given gas pressures are predicted using Ar-filled Pt-based nanostructures and Non-Equilibrium Molecular Dynamics (NEMD) simulation combined with Grand Canonical Monte Carlo (GCMC) simulation. It is found that S increases by increasing the height of the nanoposts and temperature difference across the nanostructure, and decreasing the interpost spacings, with the maximum degree of switch, S-max similar to 45 and 170 for Delta T = 10 K and 60 K, respectively, for the nanogap size of 5 nm. It is also observed that a stronger solid-fluid surface interaction results in a wider switch operating temperature window.en_US
dc.description.sponsorshipNational Science Foundation - United States under Award No. EPS-0903806 and matching support from the State of Kansas through the Kansas Board of Regents. This work is also partially supported by a start-up fund from the College of Engineering, Wichita State University. This work also used the Extreme Science and Engineering Discovery Environment (XSEDE), which is supported by National Science Foundation grant number ACI-1053575.en_US
dc.relation.ispartofseriesInternational Journal of Heat and Mass Transfer;v.121
dc.subjectGas-filled nanogapen_US
dc.subjectNon-linear heat transferen_US
dc.subjectGrand Canonical Monte Carlo simulationen_US
dc.titleThermal switch using controlled capillary transition in heterogeneous nanostructuresen_US
dc.rights.holder© 2017 Elsevier Ltd. All rights reserved.en_US

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