THE EFFECT OF CONVECTIVE HEAT TRANSFER ON CHANGES IN THE HEAT FLUX DURING SNOW TAMPING
A.F. Galkin1, M.N. Zheleznyak1, A.F. Zhirkov1, V.P. Osipov2
1Melnikov Permafrost Institute, Siberian Branch of the Russian Academy of Sciences, Yakutsk, Russia
2Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Moscow, Russia
Keywords: snow reclamation, heat flow, permafrost zone, snow compaction, thermal resistance of snow
Abstract
This study aimed to establish patterns of heat flow changes under the impact of snow tamping. To achieve this goal, a criterion for the efficiency of snow tamping has been introduced as the ratio of heat fluxes from the ground to the air before and after tamping the snow cover. If the convective component in the heat transfer coefficient is not taken into account, then the criterion is a simple quadratic dependence on the snow cover compaction coefficient. A quantitative and qualitative assessment of the accepted assumption has been performed and demonstrated that the error in determining the efficiency criterion does not exceed the values allowed in engineering practice. Thus, it has been found that the increase in the initial heat flux during snow tamping is proportional to the square of the degree of snow cover compaction and does not depend on its thermophysical properties. The formulated provisions are presented in the form of 3D graphs, which makes it possible to visually verify the validity of the assumptions made and the conclusions drawn.
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