Direct numerical simulations of turbulent pipe flow laden with finite-size neutrally buoyant particles at low flow Reynolds number
Direct numerical simulations of turbulent pipe flow laden with finite-size neutrally buoyant particles at low flow Reynolds number
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DOI：
10.1007/s00707-018-2268-2
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发表时间：
2018-10
期刊：
影响因子：
2.7
通讯作者：
Cheng Peng;Lian-Ping Wang
中科院分区：
文献类型：
--
作者：
Cheng Peng;Lian-Ping Wang
在本文中，使用基于格子玻尔兹曼方法的直接数值模拟研究了充满有限尺寸颗粒的湍流管流。我们的重点是由于存在有限尺寸的中性浮力颗粒而对管道中的湍流统计进行调制，以及调制特性是否与可比系统参数下的湍流通道流中的特性不同的问题，以便揭示管道中弯曲壁的影响。通过对湍流动能的定量预算分析，阐明了负责调节管流中湍流强度的机制。
In this paper, turbulent pipe flows laden with finite-size particles are investigated, using the direct numerical simulations based on the lattice Boltzmann method. Our focus is on the modulation of turbulence statistics in the pipe due to the presence of finite-size neutrally buoyant particles, and the question if the characteristics of modulation differ from those in a turbulent channel flow under comparable system parameters in order to reveal the effect of curved walls in the pipe. The mechanisms responsible for modulations of the turbulent intensity in the pipe flow are clarified through a quantitative budget analysis of the turbulent kinetic energy.