Numerical simulation of gas-particle flows over an in-line tube bank
Numerical simulation of gas-particle flows over an in-line tube bank
复制标题
在线管束上气体颗粒流的数值模拟
DOI：
10.21914/anziamj.v48i0.66
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发表时间：
2007
期刊：
影响因子：
0.9
通讯作者：
Z. Tian
中科院分区：
文献类型：
--
作者：
Z. Tian
本文对同列管束中颗粒-壁面碰撞现象及其对颗粒相流的贡献进行了数值研究。用拉格朗日粒子跟踪模型模拟了直径分别为30和93µm的颗粒，其中包括颗粒-壁面碰撞模型和随机壁面粗糙度模型。用实验数据验证了预测的气相和93 mm颗粒的平均速度和脉动分布。数值预测表明，壁面粗糙度通过改变大颗粒的回弹行为，从而影响下游的颗粒轨迹，从而产生相当大的影响。
We present a numerical investigation of particle-wall collision phenomenon and its contribution to particle phase flows in an in-line tube bank. Particles with diameters of 30$\mu$m and 93$\mu$m were simulated using a Lagrangian particle tracking model, which included a particle-wall collision model and a stochastic wall roughness model. The predicted mean velocity and fluctuation profiles for both gas and 93$\mu$m particles were validated against experimental data. The numerical predictions reveal that the wall roughness has a considerable effect by altering the rebounding behaviours of large particles, and consequently affecting particle trajectories downstream.