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Water Transport in Phase-Changing Snowpacks

机译:相变积雪中的水运输

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摘要

A one-dimensional model is presented for meltwater transport in a phase-changing snowpack. The model treats the snowpack as a multiphase mixture consisting of a rigid ice matrix along with air and water. Due to applied surface heating or internal temperature gradients, melting and freezing may occur, so that the water and ice phases are interconvertible. The thermodynamics of the phase changes is included by treating the phase fronts as propagating singular surfaces where the equations for the bulk region are supplemented by appropriate interface or jump conditions at the phase fronts, which leads to a generalized Stefan problem. One dimensional numerical illustrations are given for various applied surface heatings in an isothermal snowpack.
机译:提出了一维模型用于相变积雪中的融水运输。该模型将积雪视为多相混合物,由硬质冰基质以及空气和水组成。由于施加的表面加热或内部温度梯度,可能会发生融化和冻结,因此水相和冰相可以互换。通过将相前锋视为传播的奇异表面来包括相变的热力学,在该奇异表面上,通过在相前锋处的适当界面或跃变条件对本体区域的方程进行补充,这导致了广义的Stefan问题。给出了等温积雪中各种施加的表面加热的一维数值图示。

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