Development of finite element code for the analysis of coupled Thermo-Hydro-Mechanical behaviors of a saturated-unsaturated medium
Development of finite element code for the analysis of coupled Thermo-Hydro-Mechanical behaviors of a saturated-unsaturated medium
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DOI：
10.1016/b978-0-12-701620-7.50053-2
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发表时间：
1987-11
期刊：
影响因子：
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通讯作者：
Y. Ohnishi;H. Shibata;Alkira Kobayashi
中科院分区：
文献类型：
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作者：
Y. Ohnishi;H. Shibata;Alkira Kobayashi
[en]提出了一种描述多孔地质介质热-水-力耦合特性的模型。该模型的数学公式采用毕奥固结理论和能量平衡方程。模型中介质处于饱和-非饱和渗流状态，考虑了自由面的影响。该模型，纳入有限元数值计算程序，在一个二维的计算机代码中实现。该程序是在假定介质为多孔弹性介质、处于平面应变状态、地下水不相变、热传导和对流的条件下开发的。有关土壤和岩石的固结理论，固体热弹性和热液对流理论的分析解决方案提供了验证的应力和流体流动耦合，分别在耦合模型。分析了几类问题。一是研究了热-水-力学完全耦合作用对含埋热源饱和-非饱和多孔岩石响应的影响。模拟和分析了一个含有高温放射性废物的地下开口的开挖过程。结果表明，数值方法可以在一定程度上估计耦合现象。该计算机代码具有强大的分析能力，能够分析出知识库的复杂性
[en] A model is presented which describes fully coupled thermo-hydro-mechanical behavior of porous geologic medium. The mathematical formulation for the model utilizes the Biot theory for the consolidation and the energy balance equation. The medium is in the condition of saturated-unsaturated flow, then the free surfaces are taken into consideration in the model. The model, incorporated in a finite element numerical procedure, was implemented in a two-dimensional computer code. The code was developed under the assumptions that the medium is poro-elastic and in plane strain condition; water in the ground does not change its phase; heat is transferred by conductive and convective flow. Analytical solutions pertaining to consolidation theory for soils and rocks, thermoelasticity for solids and hydrothermal convection theory provided verification of stress and fluid flow couplings, respectively in the coupled model. Several types of problems are analyzed. The one is a study of some of the effects of completely coupled thermo-hydro-mechanical behavior on the response of a saturated-unsaturated porous rock containing a buried heat source. Excavation of an underground opening which has radioactive wastes at elevated temperatures is modeled and analyzed. The results shows that the coupling phenomena can be estimated at some degree by the numerical procedure. The computer code has a powerful ability to analyze of the repository the complex nature of the repository