Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate
We report disparate quasiballistic heat conduction trends for periodic nanoscale line heaters deposited on a substrate, depending upon whether measurements are based on the peak temperature of the heaters or the temperature difference between the peak and the valley of two neighboring heaters. The d...
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Institute of Physics (AIP)
2014
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| Online Access: | http://hdl.handle.net/1721.1/88704 https://orcid.org/0000-0001-8051-5378 https://orcid.org/0000-0002-3968-8530 |
| _version_ | 1826212866461532160 |
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| author | Zeng, Lingping Chen, Gang |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Zeng, Lingping Chen, Gang |
| author_sort | Zeng, Lingping |
| collection | MIT |
| description | We report disparate quasiballistic heat conduction trends for periodic nanoscale line heaters deposited on a substrate, depending upon whether measurements are based on the peak temperature of the heaters or the temperature difference between the peak and the valley of two neighboring heaters. The degree of quasiballistic transport is characterized by the effective thermal conductivities of the substrate which are obtained by matching the diffusion solutions to the phonon Boltzmann transport equation results. We find that while the ballistic heat conduction effect based on the peak temperature diminishes as the two heaters become closer, it becomes stronger based on the peak-valley temperature difference. Our results also show that the collective behavior of closely spaced heaters can counteract the nonlocal effects caused by an isolated nanoscale hot spot. These results are relevant to thermal conductivity spectroscopy techniques under development and also have important implications for understanding nonlocal heat conduction in integrated circuits and carbon nanotube array thermal interface materials. |
| first_indexed | 2024-09-23T15:39:21Z |
| format | Article |
| id | mit-1721.1/88704 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:39:21Z |
| publishDate | 2014 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/887042022-09-29T15:16:03Z Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate Zeng, Lingping Chen, Gang Massachusetts Institute of Technology. Department of Mechanical Engineering Chen, Gang Zeng, Lingping Chen, Gang We report disparate quasiballistic heat conduction trends for periodic nanoscale line heaters deposited on a substrate, depending upon whether measurements are based on the peak temperature of the heaters or the temperature difference between the peak and the valley of two neighboring heaters. The degree of quasiballistic transport is characterized by the effective thermal conductivities of the substrate which are obtained by matching the diffusion solutions to the phonon Boltzmann transport equation results. We find that while the ballistic heat conduction effect based on the peak temperature diminishes as the two heaters become closer, it becomes stronger based on the peak-valley temperature difference. Our results also show that the collective behavior of closely spaced heaters can counteract the nonlocal effects caused by an isolated nanoscale hot spot. These results are relevant to thermal conductivity spectroscopy techniques under development and also have important implications for understanding nonlocal heat conduction in integrated circuits and carbon nanotube array thermal interface materials. United States. Dept. of Energy. Office of Science (Award DE-SC0001299/DE-FG02-09ER46577) 2014-08-15T13:12:11Z 2014-08-15T13:12:11Z 2014-08 2014-05 Article http://purl.org/eprint/type/JournalArticle 0021-8979 1089-7550 http://hdl.handle.net/1721.1/88704 Zeng, Lingping, and Gang Chen. "Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate." J. Appl. Phys. 116, 064307 (2014). https://orcid.org/0000-0001-8051-5378 https://orcid.org/0000-0002-3968-8530 en_US http://dx.doi.org/10.1063/1.4893299 Journal of Applied Physics Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Institute of Physics (AIP) Bolin Liao |
| spellingShingle | Zeng, Lingping Chen, Gang Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| title | Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| title_full | Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| title_fullStr | Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| title_full_unstemmed | Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| title_short | Disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| title_sort | disparate quasiballistic heat conduction regimes from periodic heat sources on a substrate |
| url | http://hdl.handle.net/1721.1/88704 https://orcid.org/0000-0001-8051-5378 https://orcid.org/0000-0002-3968-8530 |
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