Mechanism of Thermal Transport in Dilute Nanocolloids
- 10 January 2007
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 98 (2), 028302
- https://doi.org/10.1103/physrevlett.98.028302
Abstract
Thermal conduction modes in a nanocolloid (nanofluid) are quantitatively assessed by combining linear response theory with molecular dynamics simulations. The microscopic heat flux is decomposed into three additive fluctuation modes, namely, kinetic, potential, and collision. For low volume fractions (<1%) of nanosized platinum clusters which interact strongly with xenon host liquid, a significant thermal conductivity enhancement results from the self correlation in the potential flux. Our findings reveal a molecular-level mechanism for enhanced thermal conductivity in nanocolloids with short-ranged attraction and offer predictions that can be experimentally tested.Keywords
This publication has 25 references indexed in Scilit:
- Effects of nanoparticle clustering and alignment on thermal conductivities of Fe3O4 aqueous nanofluidsApplied Physics Letters, 2006
- Thermal conductivity of Fe nanofluids depending on the cluster size of nanoparticlesApplied Physics Letters, 2006
- Empirical correlation finding the role of temperature and particle size for nanofluid (Al2O3) thermal conductivity enhancementApplied Physics Letters, 2005
- Enhanced thermal conductivity of TiO2—water based nanofluidsInternational Journal of Thermal Sciences, 2005
- Study of the enhanced thermal conductivity of Fe nanofluidsJournal of Applied Physics, 2005
- Model for Heat Conduction in NanofluidsPhysical Review Letters, 2004
- Role of Brownian motion in the enhanced thermal conductivity of nanofluidsApplied Physics Letters, 2004
- Temperature Dependence of Thermal Conductivity Enhancement for NanofluidsJournal of Heat Transfer, 2003
- Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticlesApplied Physics Letters, 2001
- Heterogeneous MediaPublished by Springer Nature ,2000