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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

HEAT TRANSFER IN SNOW THICKNESS

Get access (open in a dialog) DOI: 10.1615/IHTC9.390
pages 491-495

Abstract

The specific nature of heat transfer in high latitude Arctic systems consists in the necessity to take into account the snow cover. The problem is to determine the convective heat transfer, in particular, the thermal conductivity coefficient λs based on heat transfer in snow thickness. The fact of existence of daily air temperature fluctuations, periodic variation of snow thickness temperature and effect of these variations on the temperature regime of the ground is used for the solution of this problem. It has been shown that for large times the temperature fluctuations in snow thickness can be averaged and one can pass to the consideration of conventionally stationary regime. The experimental results of field experiments performed by standard sensors are reported. Using these experiments and solution of the problem on heat transfer in snow thickness in the form of generalized dependences the value of thermal conductivity coefficient has been obtained. The agreement between the value λs obtained by the mathematical model and its value obtained by actual data is accounted for by the presence of convective heat transfer component in a snow due to wind generation of turbulent air flows into the snow thickness. The velocity profile of convective heat transfer component is found using the method of conventionally stationary regime.