Abstract
The nanoparticle thermal conductivity and nanoscale thermal contact resistance were investigated by molecular dynamics (MD) simulations to further understand nanoscale porous media thermal conductivity. Macroscale porous media thermal conductivity models were then revised for nanoporous media. The effective thermal conductivities of two packed beds with nanoscale nickel particles and a packed bed with microscale nickel particles were then measured using the Hot Disk. The measured results show that the nano/microscale porous media thermal conductivities were much less than the thermal conductivities of the solid particles. Comparison of the measured and calculated results shows that the revised combined parallel-series model and the revised Hsu-Cheng model can accurately predict the effective thermal conductivities of micro- and nanoparticle packed beds.
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References
Tien C L, Chen G. Challenges in microscale conductive and radiative heat-transfer. J Heat Transf, 1994, 116: 799–807
Chen G. Nonlocal and nonequilibrium heat conduction in the vicinity of nanoparticles. J Heat Transf, 1996, 118: 539–545
Pop E. Energy dissipation and transport in nanoscale devices. Nano Res, 2010, 3: 147–169
Zeng T F, Liu W. Phonon heat conduction in micro- and nano-core-shell structures with cylindrical and spherical geometries. J Appl Phys, 2003, 93: 4163–4168
Yuan S P, Jiang P X. Thermal conductivity of small nickel particles. Int J Thermophys, 2006, 27: 581–595
Liu Q X. The MD studies on heat conduction in the nano-layer and fluid flow in the nano-pores (in Chinese). Doctoral Dissertation. Beijing: Tsinghua University, 2008
Plimpton S. Fast parallel algorithms for short-range molecular dynamics. J Comput Phys, 1995, 117: 1–19
Allen M P, Tildesley D J. Computer Simulation of Liquids. Oxford: Clarendon Press, 1987
Cai J, Ye Y Y. Simple analytical embedded-atom-potential model including a long-range force for fcc metals and their alloys. Phys Rev B, 1996, 54: 8398–8410
Incropera F P, DeWitt D P, Bergman T L, et al. Fundamentals of Heat and Mass Transfer. New York: John Wiley, 2007
Xiang H, Jiang P X, Liu Q X. Non-equilibrium molecular dynamics study of nanoscale thermal contact resistance. Mol Simulat, 2008, 34: 679–687
Zehner P, Schlunder E U. Thermal conductivity of granular materials at moderate temperature (in German). Chemie Ingenieur Technik- CIT, 1970, 42: 933–941
Hsu C T, Cheng P, Wong K W. Modified Zehner-Schlunder models for stagnant thermal conductivity of porous media. Int J Heat Mass Trans, 1994, 37: 2751–2759
Sullins A D, Daryabeigi K. Effective thermal conductivity of high porosity open cell nickel foam. 35th AIAA Thermophysics Conference, Anaheim CA, 2001
Gustafsson S E. Transient plane source techniques for thermal conductivity and thermal diffusivity measurements of solid materials. Rev Sci Instrum, 1991, 62: 797–804
Gustavsson M, Karawacki E, Gustafsson S E. Thermal-conductivity, thermal-diffusivity, and specific-heat of thin samples from transient measurements with Hot Disk Sensors. Rev Sci Instrum, 1994, 65: 3856–3859
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Jiang, P., Xiang, H. & Xu, R. Theoretical and experimental study of the thermal conductivity of nanoporous media. Sci. China Technol. Sci. 55, 2140–2147 (2012). https://doi.org/10.1007/s11431-012-4865-y
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DOI: https://doi.org/10.1007/s11431-012-4865-y