Particle deposition and clogging as an Obstacle and Opportunity for sustainable energy
Particle deposition and clogging as an Obstacle and Opportunity for sustainable energy
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DOI：
10.1016/j.jclepro.2024.141312
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发表时间：
2024-02
影响因子：
11.1
通讯作者：
Mehryar Amir Hosseini;P. Tahmasebi
中科院分区：
文献类型：
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作者：
Mehryar Amir Hosseini;P. Tahmasebi
细颗粒运动对多孔介质具有重大影响，体现在各种自然现象和工业应用中。颗粒的运动会导致通道堵塞，造成堵塞。根据具体情况，堵塞可能是有利的，也可能是有害的。在细颗粒尺度上，物理化学相互作用在堵塞过程中起着至关重要的作用。为了研究这些相互作用的影响，我们将 Derjaguin-Landau-Verwey-Overbeek (DLVO) 理论耦合到计算流体动力离散元 (CFD-DEM) 方法中。除了裂缝系统的物理性质和细颗粒的特征外，注入速度对堵塞的发生也起着至关重要的作用。因此，我们研究了 10 种不同的注入速率，并对 20 个具有相同粒子插入速率的模拟设置进行了建模，以同时分析 DLVO 理论和注入速率的影响。我们的研究重点是检查这些参数对域中各个区域的粒子行为的影响，包括粒子-粒子力、流体-粒子力、过渡速度、旋转速度、流体速度和流体-粒子动量交换。我们的研究结果表明，DLVO 力显着影响喉部堵塞内的流体和颗粒特征。我们的结果表明，DLVO 的考虑使喉部之前的颗粒浓度增加了 40% 以上。此外，我们的结果证明了不同注入速率之间的过渡，其中注入速率的轻微变化（即 0.06 μm/s）可以改变系统的行为。我们确定了临界流体注入速率，以超过临界速度的速率将流体注入系统可以防止堵塞，而较低的速率会导致堵塞的发生。
Fine particle motions have significant implications in porous media, manifesting in various natural phenomena and industrial applications. The movement of particles can lead to channel blockage, resulting in clogging. Depending on the context, clogging can be either advantageous or detrimental. At the scale of fine particles, physiochemical interactions play a crucial role in the clogging process. To examine the influence of these interactions, we have coupled the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory into the Computational Fluid Dynamic-Discrete Element (CFD-DEM) approach. Aside from the physical properties of the fracture systems and the characteristics of fine particles, the injection rate also plays a pivotal role in clogging occurrence. Consequently, we investigated 10 different injection rates and modeled 20 simulation setups with identical particle insertion rates to concurrently analyze the effects of the DLVO theory and injection rate. Our study focused on examining the impact of these parameters on particle behavior in various regions of the domain, including particle-particle force, fluid-particle force, transitional velocity, rotational velocity, fluid velocity, and fluid-particle momentum exchange. Our findings reveal that the DLVO force significantly influences fluid and particle characteristics within the throat blockage. Our results indicated that DLVO consideration increased the particle concentrations by more than 40% before the throat. Moreover, our results demonstrate a transition between different injection rates, where a slight change in injection rate (ie, 0.06 μ m/s) can change the system's behavior. We identified a critical fluid injection rate, whereby injecting fluid into the system at a rate surpassing the critical velocity can prevent clogging, while lower rates result in clogging occurrence.