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Phonon transport across mesoscopic constrictions / Dhruv Singh in Journal of heat transfer, Vol. 133 N° 4 (Avril 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [042402/1-8] Titre : Phonon transport across mesoscopic constrictions Type de document : texte imprimé Auteurs : Dhruv Singh, Auteur ; Jayathi Y. Murthy, Auteur ; Timothy S. Fisher, Auteur Année de publication : 2011 Article en page(s) : pp. [042402/1-8] Note générale : Physique Langues : Anglais (eng) Mots-clés : Boltzman  transport  equation  Constriction  resistance  Ballistic-diffusive  transition  Gas  gap  conductance  Slip  flow  and  heat  transfer  Knudsen  number  Temperature  jump Index. décimale : 536 Chaleur. Thermodynamique Résumé : Phonon transport across constrictions formed by a nanowire or a nanoparticle on a substrate is studied by a numerical solution of the gray Boltzmann transport equation (BTE) resolving the effects of two length scales that govern problems of practical importance. Predictions of total thermal resistance for wire/substrate and particle/substrate combinations are made for the entire range of Knudsen number, with an emphasis on resolving transport in the mesoscopic regime where ballistic-diffusive mechanisms operate and analytical expressions are not available. The relative magnitudes of bulk and constriction resistance are established, and a correlation for overall thermal resistance spanning the range of practical Knudsen numbers is provided. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...] [article] Phonon transport across mesoscopic constrictions [texte imprimé] / Dhruv Singh, Auteur ; Jayathi Y. Murthy, Auteur ; Timothy S. Fisher, Auteur . - 2011 . - pp. [042402/1-8]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [042402/1-8] Mots-clés : Boltzman  transport  equation  Constriction  resistance  Ballistic-diffusive  transition  Gas  gap  conductance  Slip  flow  and  heat  transfer  Knudsen  number  Temperature  jump Index. décimale : 536 Chaleur. Thermodynamique Résumé : Phonon transport across constrictions formed by a nanowire or a nanoparticle on a substrate is studied by a numerical solution of the gray Boltzmann transport equation (BTE) resolving the effects of two length scales that govern problems of practical importance. Predictions of total thermal resistance for wire/substrate and particle/substrate combinations are made for the entire range of Knudsen number, with an emphasis on resolving transport in the mesoscopic regime where ballistic-diffusive mechanisms operate and analytical expressions are not available. The relative magnitudes of bulk and constriction resistance are established, and a correlation for overall thermal resistance spanning the range of practical Knudsen numbers is provided. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...]