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On the use of strong discontinuity formulations for the modeling of preferential moisture uptake in fractured porous media

机译：关于使用强不连续性公式模拟裂缝性多孔介质中优先吸水的模型

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摘要

Cracking renders a structure vulnerable for preferential penetration of fluids and dissolved particles. Wetting may cause degradation of the material and accelerate the damage process considerably. In order to assess the degradation rate, understanding of the mutual interaction between cracking and fluid flow is crucial. The influence of (macro-) cracks on the flow field can be taken into account by either explicitly modeling them, which requires very refined finite element meshes, or by using a strong discontinuity approach, where cracks are represented as internal boundaries. In this paper, we investigate how hygric boundary conditions can be imposed along these internal boundaries, both with the generalized finite element method (CFEM) and the discrete strong discontinuity approach (DSDA). Hygric boundary conditions can be employed to couple the flow in the fracture and the material matrix. Several benchmark examples illustrate the performance of the proposed coupling techniques.
机译：裂纹使结构易受流体和溶解颗粒优先渗透的影响。润湿可能会导致材料降解，并大大加速损坏过程。为了评估降解速率，了解裂缝与流体流动之间的相互作用至关重要。可以通过明确建模（需要非常精细的有限元网格）或使用强不连续性方法（其中裂缝表示为内部边界）来考虑（宏观）裂缝对流场的影响。在本文中，我们研究了如何使用广义有限元方法（CFEM）和离散强不连续性方法（DSDA）沿这些内部边界施加hygric边界条件。可以采用Hygric边界条件来耦合裂缝和材料基质中的流动。几个基准示例说明了所提出的耦合技术的性能。

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  • 来源
    《Computer Methods in Applied Mechanics and Engineering》 |2010年第48期|p.2828-2839|共12页
  • 作者

    J. Alfaiate; P. Moonen; L.J. Sluys; J.Carmeliet;

  • 作者单位

    Institute Superior Tecnico and ICIST, Dept. Eng. Civil, Lisbon, Portugal;

    Katholieke Universiteit Leuven (KUL), Laboratory of Building Physics, Leuven, Belgium,Delft University of Technology (TUD), Dept. of Civil Eng. And Ceosciences, Delft, The Netherlands,Swiss Federal Institute of Technology (ETH), Chair of Building Physics, Zurich, Switzerland,Swiss Federal Laboratories for Materials Science and Technology (Empa), Laboratory for Building Science and Technology, Zurich, Switzerland;

    Delft University of Technology (TUD), Dept. of Civil Eng. And Ceosciences, Delft, The Netherlands;

    Swiss Federal Institute of Technology (ETH), Chair of Building Physics, Zurich, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fluid flow; preferential uptake; continuous-discontinuous modeling; strong discontinuity approach; GFEM; DSDA;

    机译：流体流量优先吸收;连续-不连续建模强烈的不连续性方法;GFEM;DSDA;

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