The mathematical model water and air movement in snow is studied taking into account sublimation. Snow is simulated as a four-phase continuous porous medium. The pores are entirely occupied by a mixture of water, air and vapor. To describe the process, the mass conservation equations for each phase, the Musket–Leverett system of two-phase filtration equations for water and air, and the energy conservation equation for snow are used.

中文翻译：

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雪升华模型问题的可解性

研究了考虑升华的雪中水气运动的数学模型。雪被模拟为四相连续多孔介质。孔隙完全被水、空气和蒸汽的混合物占据。为了描述该过程，使用了每个相的质量守恒方程、水和空气两相过滤方程的 Musket-Leverett 系统以及雪的能量守恒方程。