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- W2893710302 abstract "Abstract Theoretically understanding the thermal conductivity of the nanoparticle packed beds (NPBs) is critical for designing high-performance thermal insulation materials. Currently, the classical effective medium assumption (EMA) model, Nan model, just show their good prediction at a high porosity of NPBs (≥0.75). Herein, we propose a generalized model of the thermal conductivity that almost covers the whole porosity range by considering the effect of the nanoparticle deformations on the thermal contact resistance ( R ). It has been demonstrated that our model matches the experimental results great well. It is also found that at high porosity R is dominated by the phonon diffusive scatterings ( R cd ), while it is determined by the phonon ballistic scatterings ( R cb ) at a low porosity. More interestingly, R can determine the porosity at which the lowest thermal conductivity of NPBs appears. This work opens a new way to design the desired thermal insulation materials." @default.
- W2893710302 created "2018-10-05" @default.
- W2893710302 creator A5034558144 @default.
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- W2893710302 date "2019-02-01" @default.
- W2893710302 modified "2023-09-24" @default.
- W2893710302 title "A generalized thermal conductivity model for nanoparticle packed bed considering particle deformation" @default.
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- W2893710302 doi "https://doi.org/10.1016/j.ijheatmasstransfer.2018.09.067" @default.
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