Compositional Two-Phase Flow in Saturated-Unsaturated Porous Media: Benchmarks for Phase Appearance/Disappearance
Compositional Two-Phase Flow in Saturated-Unsaturated Porous Media: Benchmarks for Phase Appearance/Disappearance
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饱和-不饱和多孔介质中的组合两相流：相出现/消失的基准
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Granet
中科院分区：
文献类型：
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作者：
A. Bourgeat;F. Smaï;S. Granet
简历本文介绍的两个试验案例是为了模拟核废料处置库周围核素的迁移迁移，属于[1]、[2]中提出的“两相数值试验数据库”。它们最初是在法国研究小组MoMaS的框架内设计的[3]。设计[1]中提出的所有测试用例的出发点来自多孔介质中多相流的传统模拟器在试图模拟长寿命高放核废物的深层地质处置库中的气体迁移时所面临的一些主要挑战;特别是对于低渗透性泥质岩寄主岩石，正如大多数欧洲放射性废物管理组织和监管机构所考虑的那样（例如，参见：[4]）。这种类型的多孔介质中的气体运移是由可压缩的两相部分混溶流驱动的，并且由非线性抛物型PDE系统描述（参见[5]）。下面和[1]中所介绍的测试用例的目的是解决在数值模拟这种地下核废料处置库中的气体迁移时遇到的一些具体问题。但是，因为我们对物理模拟固有的困难感兴趣，而对数值方法的困难感兴趣较少，所以在所有这些试验情况中，我们保持了一个对应于准一维流动的简单几何形状。第一个测试案例的动机是通过模拟气相的出现/消失在两相流中，所产生的注入H2在一个均匀的多孔介质中，最初完全饱和纯水。第二个测试用例的目的是模拟可压缩和部分混溶两相流的演化，从平衡初始状态开始，由两个相邻的部分液体饱和区组成，具有两个不同的均匀压力。
Resume. The two test cases presented herein aimed at simulating the transport migration of nuclides around a nuclear waste repository and belong to the "Two-Phases Numerical Test Data Base" presented in [1], [2]. They were initially designed in the framework of the French research group MoMaS [3]. The starting point in designing all the test cases presented in [1] comes from some of the main challenges the traditional simulators for multiphase flow in porous media are facing when attempting to simulate gas migration in deep geological repositories for long-lived high-level nuclear waste; particularly with low permeability argillites host rocks, as considered by most European radioactive waste management organisations and regulators ( see for instance: [4]). The gas migration in this type of porous media is driven by a compressible two-phase partially miscible flow, and is described by a system of nonlinear parabolic PDE’s (see [5]). The aim of the test-cases presented below and in [1] is to address some of the specific problems encountered when numerically simulating gas migration in such underground nuclear waste repositories. But, because we are interested in the difficulties inherent to physical modeling , and less in the ones coming from numerical methods, we kept in all these test cases a simple geometry corresponding to a quasi 1-D flow. The first test case is motivated by simulating the gas-phase appearance/disappearance in a two-phase flow, produced by injection of H2 in a homogeneous porous medium initially fully saturated with pure water. The aim of the second test case is to simulate the evolution of a compressible and partially miscible two-phase flow, starting from an out of equilibrium initial state, made up of two adjacent partially liquid saturated zones with two different uniform pressures .
多孔介质中两相二组分流的全耦合广义混合混合有限元近似第二部分：数值方案和数值结果
影响因子：
2.5
作者：
Estelle Marchand;Torsten M¨ ller;Peter Knabner
通讯作者：
Peter Knabner
影响因子：
4.7
作者：
Serge Kräutle
通讯作者：
Serge Kräutle