Four-way coupled simulations of small particles in turbulent channel flow: The effects of particle shape and Stokes number
Four-way coupled simulations of small particles in turbulent channel flow: The effects of particle shape and Stokes number
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DOI：
10.1063/1.4927277
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发表时间：
2015-08
影响因子：
4.6
通讯作者：
F. Zhao;W. George;B. Wachem
中科院分区：
文献类型：
--
作者：
F. Zhao;W. George;B. Wachem
本文研究了颗粒形状和斯托克斯数对非球形颗粒在槽道湍流中行为的影响。虽然有许多研究涉及湍流中的球形颗粒，但在加工、能源和制药工业中最重要的应用是处理非球形颗粒。计算采用了独特的和新颖的四路耦合与拉格朗日点粒子的方法。在低雷诺数（Reτ = 150）下，采用直接数值模拟的方法模拟流体相，同时对颗粒进行单独跟踪。颗粒间和颗粒壁碰撞也被考虑在内。为了探讨颗粒对流动湍流的影响，考虑具有不同惯性和纵横比的椭球颗粒，分析了流体流动的统计特性，例如流体速度、湍流动能方程中的项、两相之间的滑移速度和速度相关性。结果...
This paper investigates the effects of particle shape and Stokes number on the behaviour of non-spherical particles in turbulent channel flow. Although there are a number of studies concerning spherical particles in turbulent flows, most important applications occurring in process, energy, and pharmaceutical industries deal with non-spherical particles. The computation employs a unique and novel four-way coupling with the Lagrangian point-particle approach. The fluid phase at low Reynolds number (Reτ = 150) is modelled by direct numerical simulation, while particles are tracked individually. Inter-particle and particle-wall collisions are also taken into account. To explore the effects of particles on the flow turbulence, the statistics of the fluid flow such as the fluid velocity, the terms in the turbulence kinetic energy equation, the slip velocity between the two phases and velocity correlations are analysed considering ellipsoidal particles with different inertia and aspect ratio. The results of the ...