Effects of Pore Scale Mixing on Reactive Transport

0121898瓦洛奇拟议研究的目的是增进对反应性运输的基本了解，最终将其应用于补救进程以及危险废物场地的管理和管制。一个特别的目标是确定孔尺度混合对反应传输的影响。本研究的具体目标是：(1)确定局部速度、孔几何和反应速率常数对均相孔网络中反应程度的影响；(2)确定局部速度、孔几何和反应速率常数对非均相孔网络中反应程度的影响；以及(3)建立允许在连续尺度上考虑孔尺度混合对反应传输的影响的关系。微观模型实验和格子-玻尔兹曼模拟的结合将被用来量化这些现象。LB方法是一种基于动力学理论的数值方法，用于求解复杂孔隙结构中的流体力学和扩散输运问题。***

0121898 Valocchi The objective of the proposed research is to improve fundamental understanding of reactive transport with the ultimate application to remediation processes and the management and regulation of hazardous waste sites. A particular goal is to determine the effects of pore-scale mixing on reactive transport. The specific objectives of this research are to: (1) determine the effects of local velocity, pore geometry, and reaction rate constant on the extent of reaction in a homogenous pore network, (2) determine the effects of local velocity, pore geometry, and reaction rate constant on the extent of reaction in heterogeneous pore networks, and (3) develop relationships that allow the effects of pore scale-mixing on reactive transport to be accounted for at the continuum-scale. A combination of micromodel experiments and Lattice-Boltzmann (LB) simulations will be used to quantify these phenomena. The LB method is a kinetic theory-based numerical technique for solving hydrodynamic and diffusive transport problems in complex pore structures. ***