Abstract

Mathematical model of groundwater flow in fractured porous media implemented in the GeRa code is presented. It uses the discrete fracture matrix approach which allows for explicit fractures approximation and couples 2D and 3D flow models in fractures and porous matrix respectively. Discretization is done using finite volume method on general conformal polyhedral grids, while 2D surface grids on fractures being the trace of 3D grid in the porous media on the fractures’ surfaces. The model is applied to assess the effect of fracture zones on groundwater flow through a projected radioactive waste deep geological disposal.

中文翻译：

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离散断裂矩阵模型在地下设施水流计算中的应用

摘要

提出了用GeRa代码实现的压裂多孔介质中地下水流动的数学模型。它使用离散裂缝矩阵方法，该方法可实现显式裂缝近似，并分别在裂缝和多孔基质中耦合2D和3D流模型。在一般的共形多面网格上使用有限体积方法进行离散化，而裂缝上的2D表面网格是裂缝表面上多孔介质中3D网格的痕迹。该模型通过评估放射性废物深部地质处置方法来评估裂缝带对地下水流量的影响。