Show simple item record

dc.contributor.authorAvanessian, Tadeh
dc.contributor.authorHwang, Gisuk
dc.identifier.citationAvanessian, Tadeh; Hwang, Gisuk. 2018. Thermal diode using controlled capillary in heterogeneous nanopores. International Journal of Heat and Mass Transfer, vol. 124:pp 201-209en_US
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractThe development of a compact, efficient, reliable thermal diode is crucial to improve advanced thermal management efficiency and controllability, and to enable brand new applications such as thermal logic gates and computers. In this study, we examine a nanoscale and efficient capillary-controlled thermal diode mechanism in Ar-filled Pt-based heterogeneous nanoporous structures, using Grand Canonical Monte Carlo (GCMC) simulation combined with Non-Equilibrium Molecular Dynamics (NEMD) simulation at the temperature range of 70-150 K and the pressure of 1.66 atm. Results show that the large thermal conductivity contrast between the controlled adsorption and capillary states using the structural heterogeneity (nanopillars on only one surface) and/or material heterogeneity (two different materials for nanogap surfaces) allows for the maximum thermal rectification ratio, R-max similar to 140 with minimal hysteresis under the cyclic operating temperatures -40 K < Delta T < +40 K. It is also found that the material heterogeneity is equivalent to the structural heterogeneity for minimizing the hysteresis in adsorption-capillary transition, but the heat flux across the nanogap with the material heterogeneity reduces due to weaker Ar-solid interaction. The coupled structural-material heterogeneity for the capillary-driven thermal diode is also discussed. The obtained results pave pathways for advanced thermal management systems such as thermal transistors, thermal logic gates, and computers.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.124
dc.subjectArgon Adsorptionen_US
dc.subjectGas-filled nanogapen_US
dc.subjectNon-linear heat transferen_US
dc.subjectGrand canonical Monte Carlo simulationen_US
dc.titleThermal diode using controlled capillary in heterogeneous nanoporesen_US
dc.rights.holder© 2018 Elsevier Ltd. All rights reserved.en_US

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record