Coupled Processes in Charged Porous Media: From Theory to Applications
Coupled Processes in Charged Porous Media: From Theory to Applications
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DOI：
10.1007/s11242-019-01257-3
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发表时间：
2019-10-01
影响因子：
2.7
通讯作者：
Huyghe, Jacques
中科院分区：
文献类型：
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作者：
Joekar-Niasar, Vahid;Schreyer, Lynn;Huyghe, Jacques
带电多孔介质是普遍存在的，并且由于带电固体表面、流体中的离子以及流体中的离子与固体表面之间的化学反应的存在所引起的高度耦合的流体动力学和电化学相互作用，对这样的系统进行建模在数学上和计算上是具有挑战性的。除了微观物理学，外加的外部势，如流体动力学、电学和化学势梯度，控制着系统的宏观动力学。本文旨在为不同应用的孔隙尺度和达西尺度耦合过程的模拟提供新的概述。在微观尺度上，提出了带电多孔介质的基本微观概念和相应的质量和动量平衡方程。考虑到荷电多孔介质中高度耦合的非线性物理化学过程以及这些物理化学现象与应用的长度尺度的巨大差异，在达西尺度下对这些过程的数值模拟比多孔介质中多相流的直接孔隙尺度模拟更具挑战性。因此，将微观过程放大到达西尺度是必要的，并且对于大规模应用是高度需要的。因此，我们提供和讨论达西尺度多孔介质理论得到的混合物理论和均匀化沿着与他们相应的假设。然后，这些理论的发展在粘土，电池，提高石油采收率，和生物系统的应用进行了讨论。
Charged porous media are pervasive, and modeling such systems is mathematically and computationally challenging due to the highly coupled hydrodynamic and electrochemical interactions caused by the presence of charged solid surfaces, ions in the fluid, and chemical reactions between the ions in the fluid and the solid surface. In addition to the microscopic physics, applied external potentials, such as hydrodynamic, electrical, and chemical potential gradients, control the macroscopic dynamics of the system. This paper aims to give fresh overview of modeling pore-scale and Darcy-scale coupled processes for different applications. At the microscale, fundamental microscopic concepts and corresponding mass and momentum balance equations for charged porous media are presented. Given the highly coupled nonlinear physiochemical processes in charged porous media as well as the huge discrepancy in length scales of these physiochemical phenomena versus the application, numerical simulation of these processes at the Darcy scale is even more challenging than the direct pore-scale simulation of multiphase flow in porous media. Thus, upscaling the microscopic processes up to the Darcy scale is essential and highly required for large-scale applications. Hence, we provide and discuss Darcy-scale porous medium theories obtained using the hybrid mixture theory and homogenization along with their corresponding assumptions. Then, application of these theoretical developments in clays, batteries, enhanced oil recovery, and biological systems is discussed.