Two-equation model for a diffusive process in porous media using the volume averaging method with an unsteady-state closure
作者： C. Moyne
DOI: 10.1016/S0309-1708(96)00023-1
关键词: Phase (matter) 、 Continuous phase modulation 、 Diffusion (business) 、 Closure (topology) 、 Thermodynamics 、 Materials science 、 Mechanics 、 Porous medium 、 Mass transfer 、 Thermal 、 Volume (thermodynamics)
摘要: For the diffusive transport through a two-phase material, two-equation model must be used when contrast between thermal properties of medium becomes so high that local equilibrium cannot achieved. Using volume averaging approach an unsteady-state closure is investigated, which leads to expression phase exchange term and conductive terms as temporal convolutions. Two application examples are studied, layered material cylindrical particles embedded in continuous phase. The results one-equation model, models with steady-state compared. Surprisingly, most cases, gives satisfactory results.
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