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Isogeometric analysis of THM coupled processes in ground freezing

机译：地面冻结中THM耦合过程的等几何分析

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摘要

An isogeometric analysis (IGA) based numerical model is presented for simulation of thermo-hydro-mechanically (THM) coupled processes in ground freezing. The momentum, mass and energy conservation equations are derived based on porous media theory. The governing equations are supplemented by a saturation curve, a hydraulic conductivity model and constitutive equations. Variational and Galerkin formulation results in a highly nonlinear system of equations, which are solved using Newton-Raphson iteration. Numerical examples on isothermal consolidation in plane strain, one-dimensional freezing and heave due to a chilled pipeline are presented. Reasonably good agreements were observed between the IGA based heave simulations and experimental results. (C) 2017 Elsevier Ltd. All rights reserved.
机译：提出了一种基于等几何分析（IGA）的数值模型，用于模拟地面冻结过程中的热-水-机械（THM）耦合过程。基于多孔介质理论推导了动量，质量和能量守恒方程。控制方程式由饱和曲线，水力传导率模型和本构方程式补充。变分和Galerkin公式产生了一个高度非线性的方程组，可以使用Newton-Raphson迭代求解。给出了在平面应变，一维冻结和由于管道冷却引起的沉陷等温固结的数值例子。在基于IGA的升沉模拟和实验结果之间观察到合理的良好协议。 （C）2017 Elsevier Ltd.保留所有权利。

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