论文标题
有效的细胞流量模型，用于湍流中的内聚颗粒絮凝
An efficient cellular flow model for cohesive particle flocculation in turbulence
论文作者
论文摘要
我们提出了一个单向耦合模型，该模型在概念上简单的细胞流动设置中跟踪单个主要颗粒，以预测湍流中的絮凝。该计算有效的模型解释了主要球形粒子上的Stokes阻力，润滑，凝聚力和直接接触力，并允许进行系统的模拟运动，该运动能够产生瞬态平均泡沫大小，这是无量纲参数的函数。这些模拟随时间重现了凝聚力絮凝物的生长，以及由聚集和断裂平衡控制的对数正态平衡分布的出现。当主要粒子的stokes数为\ textit {o}（1）时，絮凝的进行最快。这个简单的计算模型的结果与实验观察结果一致，从而使我们能够提出一个新的分析絮凝模型，该模型可以改善与实验数据的一致性，尤其是在瞬态阶段。
We propose a one-way coupled model that tracks individual primary particles in a conceptually simple cellular flow setup to predict flocculation in turbulence. This computationally efficient model accounts for Stokes drag, lubrication, cohesive and direct contact forces on the primary spherical particles and allows for a systematic simulation campaign that yields the transient mean floc size as a function of the governing dimensionless parameters. The simulations reproduce the growth of the cohesive flocs with time, and the emergence of a log-normal equilibrium distribution governed by the balance of aggregation and breakage. Flocculation proceeds most rapidly when the Stokes number of the primary particles is \textit{O}(1). Results from this simple computational model are consistent with experimental observations, thus allowing us to propose a new analytical flocculation model that yields improved agreement with experimental data, especially during the transient stages.
