Reference : Nanoscale Phononic Analog of the Ranque-Hilsch Vortex Tube
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Computational Sciences
http://hdl.handle.net/10993/46537
Nanoscale Phononic Analog of the Ranque-Hilsch Vortex Tube
English
Medrano Sandonas, Leonardo mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Rodríguez Méndez, Álvaro [Technical University of Dresden, Dresden, Germany - TU Dresden > Institute for Materials Science and Max Bergmann Center of Biomaterials]
Gutierrez, Rafael [Technical University of Dresden, Dresden, Germany - TU Dresden > Institute for Materials Science and Max Bergmann Center of Biomaterials]
Cuniberti, Gianaurelio [Technical University of Dresden, Dresden, Germany - TU Dresden > Institute for Materials Science and Max Bergmann Center of Biomaterials]
Mujica, Vladimiro [Arizona State University, Tempe, Arizona 85287, USA > School of Molecular Sciences]
2-Mar-2021
Physical Review Applied
American Physical Society
15
034008
Yes (verified by ORBilu)
International
2331-7019
2331-7043
College Park
MD
[en] Heat transfer ; carbon nanomaterials ; molecular dynamics
[en] Thermal management is a current global challenge that must be addressed exhaustively. We propose the design of a nanoscale phononic analog of the Ranque-Hilsch vortex tube in which heat flowing at a given temperature is split into two different streams going to the two ends of the device, inducing a temperature asymmetry. Our nanoscale prototype consists of two carbon nanotubes (capped and open) connected by molecular chains. The results show that the structural asymmetry in the contact regions is the key factor for producing the flux asymmetry and, hence, the induced temperature-bias effect. The effect can be controlled by tuning the thermal-equilibration temperature, the number of chains, and the chain length. Deposition on a substrate adds another variable to the manipulation of the flux asymmetry but the effect vanishes at very large substrate temperatures. Our study yields insights into the thermal management in nanoscale materials, especially the crucial issue of whether the thermal asymmetry can survive phonon scattering over relatively long distances, and thus provides a starting point for the design of a nanoscale phononic analog of the Ranque-Hilsch vortex tube.
Deutscher Akademischer Austauschdienst (DAAD) ; National Council of Science and Technology (CONACYT) ; German Research Foundation (DFG)
http://hdl.handle.net/10993/46537
10.1103/PhysRevApplied.15.034008
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.15.034008

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