土中における2相流体流れに関する連成数値解析

概要

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A numerical model for analyzing a flow of two immiscible fluids in porous media is developed in this paper. The two-phase flow approach is introduced to simulate a wetting and a nonwetting fluid behavior in soils under the restrictions for the capillary pressure and the saturation condition between two fluids. The Galerkin finite element formulation is performed for the governing equations to yield simultaneous transient solutions of fluid pressures. It is revealed that the upstream weighting for the evaluation of mobility factors and the use of lumped compound capacity matrix are adequate in the finite element formulation. The model is applied to the Buckley-Leverett oil-water displacement problem and the compressed air storage in an aquifer as a quantitative demonstration. The results obtained realistically describe the flow characteristics, and the model can be used to estimate the complex flow configulation in a deep-seated ground.
東海大学の論文