| Titre : | Phonon transport across mesoscopic constrictions (2011) |
| Auteurs : | Dhruv Singh, Auteur ; Jayathi Y. Murthy, Auteur ; Timothy S. Fisher, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of heat transfer (Vol. 133 N° 4, Avril 2011) |
| Article en page(s) : | pp. [042402/1-8] |
| Note générale : | Physique |
| Langues : | Anglais |
| Index. décimale : | 536 (Chaleur. Thermodynamique) |
| Tags : | Boltzman transport equation Constriction resistance Ballistic-diffusive transition Gas gap conductance Slip flow and heat transfer Knudsen number Temperature jump |
| 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&sort=chron&maxdisp=25&threshold=0&pjournals=JHTRAO&pyears=2011&possible1zone=article&fromvolume=133&fromissue=4&OUTLOG=NO&viewabs=JHTRAO&key=DISPLAY&docID=22&page=1&chapter=0 |
