论文标题
直接拦截还是惯性撞击？效率法的理论推导，用于捕获模式的简单且实用的定义
Direct interception or inertial impaction? A theoretical derivation of the efficiency power law for a simple and practical definition of capture modes
论文作者
论文摘要
我们研究了围绕固定圆柱体的流动前推的颗粒的捕获。从理论上讲，我们通常仅从数据拟合获得捕获效率的功率定律。粒子轨迹的模拟表明，遵循功率定律的捕获的颗粒小于气缸的边界层，并且经历了直接拦截，而与之差异的颗粒则更大，并且观察到了惯性的影响。我们表明，粒度和边界层厚度之间的简单比较将准确的数值结果分为主要的捕获模式。该标准在实验和模拟中是实用的，并且会提高捕获效率的缩放率的争议。
We study the capture of particles advected by flows around a fixed cylinder. We derive theoretically the power law of the capture efficiency, usually obtained from data fitting only. Simulations of particle trajectories reveal that captured particles following the power law are smaller than the boundary layer of the cylinder and experience direct interception, whereas the ones diverging from it are larger and observe inertial impaction. We show that a simple comparison between the particle size and boundary layer thickness splits accurately numerical results into their dominant capture mode. This criterion is practical in experiments and simulations, and would lift the controversy on the scaling of the capture efficiency.
