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Equivalence between volume averaging and moments matching techniques for mass transport models in porous media

机译:多孔介质中传质模型的体积平均和矩匹配技术之间的等效性

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摘要

This paper deals with local non-equilibrium models for mass transport in dual-phase and dual-region porous media. The first contribution of this study is to formally prove that the time-asymptotic moments matching method applied to two-equation models is equivalent to a fundamental deterministic perturbation decomposition proposed in Quintard et al. (2001) [ 1 ] for mass transport and in Moyne et al. (2000) [2] for heat transfer. Both theories lead to the same one-equation local non-equilibrium model. It has very broad practical and theoretical implications because (1) these models are widely employed in hydrology and chemical engineering and (2) it indicates that the concepts of volume averaging with closure and of matching spatial moments are equivalent in the one-equation non-equilibrium case. This work also aims to clarify the approximations that are made during the upscaling process by establishing the domains of validity of each model, for the mobile-immobile situation, using both a fundamental analysis and numerical simulations. In particular, it is demonstrated, once again, that the local mass equilibrium assumptions must be used very carefully.
机译:本文讨论了在双相和双区域多孔介质中进行质量传输的局部非平衡模型。这项研究的第一个贡献是正式证明了应用于两个方程模型的时间渐近矩匹配方法等同于Quintard等人提出的基本确定性摄动分解。 (2001)[1]为大众运输和在Moyne等。 (2000)[2]的传热。两种理论都导致相同的一方程局部非平衡模型。它具有非常广泛的实践和理论意义,因为(1)这些模型在水文学和化学工程中得到了广泛应用,并且(2)它表明在封闭式中,体积平均和匹配空间矩的概念在单方程非方程式中是等效的。平衡情况。这项工作还旨在通过使用基础分析和数值模拟,通过建立每种模型的适用性来确定在升迁过程中的近似值,以适用于移动不动的情况。特别是再次证明,必须非常谨慎地使用局部质量平衡假设。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2010年第22期|p.4985-4993|共9页
  • 作者单位

    Universite de Toulouse, INPT, UPS, IMFT (Institut de Mecanique des Fluides de Toulouse), Allee Camille Soula, F-31400 Toulouse, France;

    rnUniversite de Toulouse, INPT, UPS, IMFT (Institut de Mecanique des Fluides de Toulouse), Allee Camille Soula, F-31400 Toulouse, France CNRS, IMFT, F-31400 Toulouse, France;

    rnUniversite de Toulouse, INPT, UPS, IMFT (Institut de Mecanique des Fluides de Toulouse), Allee Camille Soula, F-31400 Toulouse, France CNRS, IMFT, F-31400 Toulouse, France Ecolab UMR 5245 (INP-ENSAT, UPS, CNRS), Equipe ECOGEN, Av. de fAgrobiopole, BP 32607 Auzeville Tolosane, 31326 Castanet Tolosan Cedex, France;

  • 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

    porous media; non-equilibrium; two-equation model; moments; time-asymptotic; volume averaging;

    机译:多孔介质非平衡二等式模型;时刻时间渐近体积平均;

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