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Permeability of Pore Networks Under Compaction

机译：压实下孔隙网络的渗透性

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摘要

The characteristic pore length fixes the scale of permeability of a porous medium. For pore networks undergoing strong random compaction, this length becomes singular at transition porosities, revealing a change in the microstructure of the porespace controlling the transport. Nodal balances and lattice Boltzmann simulations of flow in pore networks under compaction show that the scaling between permeability and porosity changes near the transition porosities. Simulation results are compared with experimental permeability data from transparent two-dimensional micromodels of networks decorated with the same pore size distribution. Permeability-porosity data of media undergoing smooth compaction is well described by a single power law. Under strong compaction, however, the scaling between permeability and porosity is possible by traits only, the scaling exponent changes notably at given transition porosities. These behaviors are common to a wealth of permeability-porosity data thus far unexplained.
机译：特征孔径确定了多孔介质的渗透率规模。对于经历强随机压实的孔隙网络，该长度在过渡孔隙度时变得奇异，从而揭示了控制输运的孔隙空间的微观结构发生了变化。压实作用下孔隙网络的节点平衡和晶格Boltzmann模拟表明，渗透率和孔隙度之间的标度在过渡孔隙附近变化。将模拟结果与装饰有相同孔径分布的透明二维网络微观模型的实验渗透率数据进行比较。单一幂律很好地描述了进行平滑压实的介质的渗透率-孔隙率数据。然而，在强压实作用下，渗透率和孔隙度之间的标度只能通过特性来实现，标度指数在给定的过渡孔隙度下会明显变化。这些行为是迄今为止无法解释的大量渗透率-孔隙率数据所共有的。

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  • 来源
    《Transport in Porous Media》 |2013年第2期|429-438|共10页
  • 作者

    R. E. Rozas; S. Diaz; J. Quispe; S. M. Acuna; P. G. Toledo;

  • 作者单位

    Institut fur Theoretische Physik der Weichen Materie, Heinrich Heine-Universitat Diisseldorf, UniversitatsstraBe 1,40225 Diisseldorf, Germany;

    Chemical Engineering Department and Surface Analysis Laboratory (ASIF), University of Concepcion, P.O. Box 160-C, Correo 3, Concepcion, Chile;

    Chemical Engineering Department, Universidad Catolica del Norte, Av. Angamos 0610, Antofagasta, Chile;

    Department of Food Engineering, University of Bio-Bio, P.O. Box 447, Chilian, Chile;

    Chemical Engineering Department and Surface Analysis Laboratory (ASIF), University of Concepcion, P.O. Box 160-C, Correo 3, Concepcion, Chile;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    percolation; permeability; porosity; characteristic length; compaction; pore microstructure; phase changes; transitions;

    机译：渗滤;渗透性孔隙率特征长度压实孔微结构相位变化;过渡;

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