Heat Transfer of Premelted Ice in Micro- and Nanometer-sized Powders

Authors: Rao, Nanxia¹; Zhu, Da-Ming²

Source: Molecular Simulation, Volume 30, Numbers 2-3, February, 2004 , pp. 183-188(6)

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Abstract:

Heat transfer properties of premelted ice in silica powders were studied in a temperature range slightly below 0°C. The thermal conductivity of the ice was found to be much smaller than that of bulk ice. A drop in the thermal conductivity is observed at the melting, similar to bulk behavior, but the magnitude of the drop is much smaller than that found in the bulk phase. The heat transfer rate versus temperature gradient of ice in silica powders was found to deviate slightly from a perfectly linear behavior. The deviation could be due to a disruption of homogeneity of the powder media, due to a thermomolecular pressure. Such an effect needs to be further confirmed by future experiments.

Keywords: Thermal conductivity; Interfacial melting; Powders; Heat transfer

Document Type: Research article

DOI: http://dx.doi.org/10.1080/0892702031000152082

Affiliations: 1: Department of Physics University of Missouri-Kansas City Rockhill Road 64110 Kansas City MO USA 2: Department of Modern Physics University of Science and Technology of China Hefei China

Publication date: 2004-02-01