Thermal conductivity temperature dependence of water confined in nanoporous silicon
| Autor: | Xiaorui Wang, William Gonçalves, David Lacroix, Mykola Isaiev, Séverine Gomès, Konstantinos Termentzidis |
|---|---|
| Přispěvatelé: | WANG, XIAORUI |
| Rok vydání: | 2022 |
| Předmět: |
Solid/liquid Interface
[PHYS.MECA.THER] Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph] Nanoconfined Water General Materials Science Hydrogen Bond Networks Condensed Matter Physics Molecular Dynamics Heat Transfer Porous Silicon [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] |
| Zdroj: | Journal of physics. Condensed matter : an Institute of Physics journal. 34(30) |
| ISSN: | 1361-648X |
| Popis: | Recently, it has been shown that high density nanoconfined water was the reason of the important enhancement of the effective thermal conductivity up to a factor of 50% of a nanoporous silicon filled with water. In this work, using molecular dynamics simulations, we further investigate the role of the temperature T (from 285 to 360 K) on the thermal conductivity enhancement of nanohybrid porous silicon and water system. Furthermore, by studying and analysing several structural and dynamical parameters of the nanoconfined water, we give physical insights of the observed phenomena. Upon increasing the temperature of the system, the thermal conductivity of the hybrid system increases reaching a maximum for T = 300 K. With this article, we prove the existence of new heat flux channels between a solid matrix and a nanoconfined liquid, with clear signatures both in the radial distribution function, mean square displacements, water molecules orientation, hydrogen bond networks and phonon density of states. |
| Databáze: | OpenAIRE |
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