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地 点：华家池校区，中心大楼南楼106室，环境与资源学院会议室
报 告 人：美国能源部爱达荷国家实验室研究员Dr. Huang Hai（黄海博士）
报告题目：Physics-based Computer Simulations of Multiphase Flow and Reactive Transport in Fractured and Porous Media（基于物理机制的裂隙和多孔介质中多相和反应性运移过程的计算机模拟）
报告摘要：Field investigations indicate that the flow of water through localized preferential pathways within fracture networks and fractured rocks can result in exceptionally rapid transport of contaminants in the subsurface. However, the fundamental physics governing fluid motion in unsaturated fractured porous media and the nonlinear coupling among flow, transport and changes in hydrologic properties (i.e., permeability and porosity) due to geochemical reactions are still poorly understood, and a better understanding of flow and transport processes, particularly the mechanisms that control non-uniform (preferential) flow, film flow and intermittent behavior is urgently needed. This presentation will focus on a variety of innovative computer simulation techniques that we have recently developed for modeling multiphase flow and reactive transport in fractured and porous media. These techniques, which have complementary strengths and weaknesses, include particle methods such as smoothed particle hydrodynamics and dissipative particle dynamics, lattice Boltzmann simulations, and grid-based Navier-Stokes simulators coupled with various interface tracking algorithms based on volume of fluid (VOF), level set (LS) and phase field (PH) methods. Our simulation results reveal that fluid motion in unsaturated fractures is complex, even for very simple fracture geometries under constant liquid injection conditions. Different flow behaviors within unsaturated fractures, including continuous film flow, intermittent mixed film flow, stationary capillary droplet formation and snap-off/reconnection, can coexist, depending on the fracture geometry, wetting behavior, fluid properties and so on. The models are also applicable to a large variety of scientific and engineering challenges, such as enhanced oil recovery, in-situ immobilization of toxic metals and radionuclides in groundwater, carbon sequestrations.
联系人：环资学院 陈丁江博士（13666690066）