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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Monte Carlo Simulations of the Thermal Properties of Silicon and Germanium Mesoporous Nanostructures

Get access (open in a dialog) DOI: 10.1615/IHTC15.nmm.008366
pages 5647-5656

Resumo

The Boltzmann Transport Equation for phonons is solved with Monte Carlo simulations in silicon and germanium nanostructures such as porous nanofilms and nanowires. A new method to determinate the nanoporous mean free path ?np is introduced. On this basis, thermal conductivity of mesoporous structures is addressed. This study demonstrates that the knowledge of the global phonon mean free path is a relevant indicator to quantify phonon scattering mechanisms which dominate heat transport in such structures. Results show that there are similarities between reducing the size of nanowires and increasing the porosity of these devices regarding the thermal conductivity reduction.