Abstract In this study, we have developed a combined lattice Boltzmann-smoothed profile method to explore coupled mechanisms governing transport of colloids and their retention in porous media. We have considered flow in a constricted tube and included hydrodynamic, gravity, buoyancy, van der Waals and electrostatic forces to simulate colloid transport and aggregation. A major advantage of this complete formulation is that it does not require any common assumptions which neglect the effects of inter-particle forces (e.g., dilute suspension, or clean bed filtration), and pore structure changes due to colloid retention. The results show an increase in colloid aggregation and surface coverage as pore velocity decreases. However, the pore void fraction and its conductivity show a reduction with decreased velocity. In the presence of a secondary energy minimum, rolling of colloids on the grain surface is demonstrated to be the major mechanism that prevents pore clogging. Details of these observations are provided and a comprehensive sensitivity analysis of model parameters is performed and discussed.

中文翻译：

---

胶体输运和滞留的直接孔隙尺度数值模拟。第 I 部分：流体流速、胶体尺寸和孔结构效应

摘要 在这项研究中，我们开发了一种组合晶格玻尔兹曼平滑剖面方法，以探索控制胶体传输及其在多孔介质中保留的耦合机制。我们已经考虑了收缩管中的流动，包括流体动力学、重力、浮力、范德华力和静电力来模拟胶体传输和聚集。这种完整配方的一个主要优点是它不需要任何忽略颗粒间作用力（例如，稀释悬浮液或清洁床过滤）的常见假设，以及由于胶体保留引起的孔结构变化。结果表明，随着孔隙速度的降低，胶体聚集和表面覆盖率增加。然而，孔隙率及其电导率随着速度的降低而降低。在二次能量最小值的存在下，胶体在颗粒表面的滚动被证明是防止孔隙堵塞的主要机制。提供了这些观察的详细信息，并对模型参数进行了全面的敏感性分析并进行了讨论。