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EFFECTIVE THERMAL CONDUCTIVITY OF FROST CONSIDERINGMASS DIFFUSION AND EDDY CONVECTION

卷 1, 册 4, 2010, pp. 321-336
DOI: 10.1615/SpecialTopicsRevPorousMedia.v1.i4.40
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摘要

A physical model for the effective thermal conductivity of water frost is proposed for application to the full range of frost density. The proposed model builds on the Zehner-Schlunder 1D formulation for porous media appropriate for solid-to-fluid thermal conductivity ratios less than about 1000. By superposing the effects of mass diffusion and eddy convection on stagnant conduction in the fluid, the total effective thermal conductivity of frost is shown to be satisfactorily described. It is shown that the effects of vapor diffusion and eddy convection on the frost conductivity are on the same order. The results also point out that idealization of the frost structure by cylindrical inclusions offers a better representation of the effective conductivity of frost as compared to spherical inclusions. Satisfactory agreement between the theory and the measurements for the effective thermal conductivity of frost is demonstrated for a wide range of frost density and frost temperature.

对本文的引用
  1. Kandula Max, Frost growth and densification in laminar flow over flat surfaces, International Journal of Heat and Mass Transfer, 54, 15-16, 2011. Crossref

  2. Kandula M., Frost growth and densification on a flat surface in laminar flow with variable humidity, International Communications in Heat and Mass Transfer, 39, 8, 2012. Crossref

  3. Negrelli Silvia, Hermes Christian J.L., A semi-empirical correlation for the thermal conductivity of frost, International Journal of Refrigeration, 58, 2015. Crossref

  4. Choi Sangho, Kim Sung Jin, Effect of initial cooling on heat and mass transfer at the cryogenic surface under natural convective condition, International Journal of Heat and Mass Transfer, 112, 2017. Crossref

  5. Jeong Chan Ho, Shin Dong Hwan, Konduru Vinaykumar, Allen Jeffrey S., Choi Chang Kyoung, Lee Seong Hyuk, Quantitative measurements of nanoscale thin frost layers using surface plasmon resonance imaging, International Journal of Heat and Mass Transfer, 124, 2018. Crossref

  6. Liang Xingyuan, Wu Lijun, A brief review: The mechanism; simulation and retardation of frost on the cold plane and evaporator surface, Energy and Buildings, 272, 2022. Crossref

  7. Zhang Long, Song Mengjie, Deng Shiming, Shen Jun, Dang Chaobin, Frosting mechanism and behaviors on surfaces with simple geometries: A state-of-the-art literature review, Applied Thermal Engineering, 215, 2022. Crossref

  8. Козаченко И. С., Оценка влияния исходных уравнений плотности и теплопроводности инея на результаты прогнозирования скорости формирования намороженного слоя, Refrigeration Engineering and Technology, 53, 5, 2017. Crossref

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