CFD modeling of dilute phase pneumatic conveying in a horizontal pipe using Euler–Euler approach
CFD modeling of dilute phase pneumatic conveying in a horizontal pipe using Euler–Euler approach
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DOI：
10.1080/02726351.2018.1435595
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发表时间：
2019-11
影响因子：
2.5
通讯作者：
W. Ariyaratne;C. Ratnayake;M. Melaaen
中科院分区：
文献类型：
--
作者：
W. Ariyaratne;C. Ratnayake;M. Melaaen
对塑料颗粒在水平圆管中的稀相气力输送行为进行了计算流体力学模拟。球团矿直径200微米，密度1000公斤/立方米。对湍流模型和模型碰撞参数对压降、固体体积分数和速度分布的影响进行了参数研究。在模型碰撞参数中，镜面系数对压降有较大影响。此外，对不同固体载荷和不同速度下的模拟结果与文献中的实验数据进行了比较。气速范围为6~15m/S，固气比为1~3。在较高风速下，标准k-omega湍流模型预测的压降高于标准k-epsilon模型预测的压降。相比之下，在较低的气体速度下，标准k-epsilon模型预测的压降比标准k-omega湍流模型更高。然而，对于两种不同的湍流模型，固体和空气的速度分布并没有明显的差别。
ABSTRACT Computational fluid dynamics simulations were performed to investigate the behavior of dilute phase pneumatic conveying of plastic pellets in a horizontal circular pipe. The pellets are 200 µm in diameter and 1000 kg/m3 in density. A parametric study was performed to investigate the effects of turbulence model and model collision parameters on pressure drop, solid’s volume fraction and velocity profiles. Among model collision parameters, specularity coefficient has considerable effect on the pressure drop. Moreover, the results from simulations carried out for different solid loadings and velocities were compared with experimental data found in the literature. The air velocities range from 6 to 15 m/s and solids to air mass flow ratios range from 1 to 3. At higher air velocities, the pressure drops predicted by the standard k-omega turbulence model are higher than the pressure drops predicted by the standard k-epsilon model. In contrast, at lower gas velocities, the standard k-epsilon model predicts higher pressure drops compared to the standard k-omega turbulence model. However, no significant difference in solids and air velocity profiles is observed for the two different turbulence models.