MP-PIC simulation of dilute-phase pneumatic conveying in a horizontal pipe
MP-PIC simulation of dilute-phase pneumatic conveying in a horizontal pipe
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水平管道稀相气力输送的MP-PIC模拟
DOI：
10.1016/j.powtec.2022.117894
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发表时间：
2022-09
影响因子：
5.2
通讯作者：
Wei Wang
中科院分区：
文献类型：
--
作者：
Zifeng Song;Qingzhan Li;Fei Li;Yanpei Chen;Atta Ullah;Sheng Chen;Wei Wang
采用多相颗粒池法（MP-PIC）对气力输送管内稀气固两相流动进行了数值模拟。为了达到较高的仿真精度，对不同的粒子壁碰撞模型、阻力模型和湍流调制模型进行了测试。模拟结果包括压降、气体和固体平均速度、波动速度与实验测量结果进行了比较。研究发现，颗粒壁面碰撞恢复系数，特别是切向碰撞恢复系数对总压降有显著影响。平均粒子速度和滑移速度对阻力敏感，较大的阻力可以提高仿真精度，而平均气体速度对阻力不敏感。在现有的湍流调制模型选择下，气体的波动速度很难预测，这意味着未来需要更多的努力来理解湍流。•采用MP-PIC方法对水平管道中稀相气力输送过程进行了模拟。•研究了不同子模型对仿真结果的影响。•子模型包括粒子壁碰撞模型、阻力模型和湍流调制模型。•滑移速度预测得到了特别关注。
Dilute gas-solid two-phase flows inside a pneumatic conveying pipe are simulated with the multiphase particle-in-cell (MP-PIC) method. To achieve high simulation accuracy, different particle-wall collision models, drag force models and turbulence modulation models have been tested. Simulation results including pressure drop, gas and solid mean velocities, fluctuating velocities are compared to experimental measurements. It is found that the particle-wall collision restitution coefficient, especially in the tangential direction, significantly influences the total pressure drop. The mean particle velocity and slip velocity are sensitive to the drag force and a much higher drag force can improve the simulation accuracy, whereas the mean gas velocity is not sensitive to the drag force. The fluctuating gas velocity is hard to be predicted with the currently available turbulence modulation modeling choices, implying more efforts are needed in understanding the turbulence in future. • Dilute-phase pneumatic conveying in a horizontal pipe was simulated by MP-PIC method. • Impact of different sub-models on simulation results has been investigated. • The sub-models include particle-wall collision, drag force and turbulence modulation models. • Special attention has been paid on the slip velocity prediction.
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