Abstract
Rebuilding phonon mean free path (MFP) spectra from experimental data is integral to phonon MFP spectroscopy. However, being based on effective thermal conductivity, the current integral equation for this precludes the use of certain heat sources of convenient shapes, such as a cylindrical nanoline. Herein, to enable using diverse specimens exhibiting a ballistic effect, we develop a ballistic thermal resistance-based integral equation, utilizing the ease and accuracy of the modified ballistic–diffusive equations demonstrated in the companion paper. The availability of more diverse shapes of specimens will enhance further development and widen use of phonon MFP spectroscopy.
| Original language | English |
|---|---|
| Pages (from-to) | 334-347 |
| Number of pages | 14 |
| Journal | Nanoscale and Microscale Thermophysical Engineering |
| Volume | 23 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2019 Oct 2 |
Bibliographical note
Publisher Copyright:© 2019, © 2019 Taylor & Francis.
Keywords
- Phonon mean free path
- ballistic thermal resistance
- ballistic–diffusive equations
- effective thermal conductivity
- phonon mean free path spectrum
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials