| Home > Articles > Published articles > Hydrodynamic heat transport in compact and holey silicon thin films |
| Date: | 2019 |
| Description: | 8 pàg. |
| Abstract: | A multiscale hydrodynamic-heat-transport model applicable to arbitrary geometries using finite-element methods is compared with the experimental effective thermal conductivity of silicon thin films and periodic holey membranes for different sizes and temperatures. The range of system length scales and temperatures in which the model predictions agree with experimental data is discussed and quantitatively determined. The model agrees with experimental results when the smallest system size is larger than twice the nonlocal length, an intrinsic property of the material that depends only on temperature. These results open the door to the use of the hydrodynamic equation instead of an effective Fourier model to interpret current heat-transport experimental data. |
| Grants: | Agencia Estatal de Investigación MTM2017-82317-P Ministerio de Economía y Competitividad TEC2015-67462-C2-2-R Ministerio de Economía y Competitividad TEC2015-67462-C2-1-R Ministerio de Economía y Competitividad CSD2010-00044 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1018 |
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| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Subject: | Carrier dynamics ; Heat transfer ; Phonons ; Thermal conductivity ; Transport phenomena ; Elemental semiconductors ; Nanostructures ; Hydrodynamic models |
| Published in: | Physical review applied, Vol. 11, issue 3 (2019) , art. 34003, ISSN 2331-7019 |
8 p, 1.7 MB |