湍流中惯性粒子的重力驱动聚集
Gravity-driven clustering of inertial particles in turbulence.
作者信息
Park Yongnam, Lee Changhoon
机构信息
Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, Korea.
Department of Computational Science and Engineering and Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodamun-gu, Seoul, Korea.
出版信息
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Jun;89(6):061004. doi: 10.1103/PhysRevE.89.061004. Epub 2014 Jun 26.
We report a different kind of particle clustering caused purely by gravity, discovered in our simulation of particle-laden turbulence. Clustering in a vertical strip pattern forms when strong gravity acts on heavy particles. This phenomenon is explained by the skewness of the flow velocity gradient in the gravitational direction experienced by particles, which causes horizontal convergence of particles.
我们报告了一种在充满粒子的湍流模拟中发现的、完全由重力引起的不同类型的粒子聚集现象。当强重力作用于重粒子时，会形成垂直条带模式的聚集。这种现象可以通过粒子在重力方向上所经历的流速梯度的偏斜来解释，这会导致粒子的水平汇聚。
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