论文标题
使用基于单粒子实验的新充电模型对PMMA粉末流动式仿真
Simulation of PMMA powder flow electrification using a new charging model based on single-particle experiments
论文作者
论文摘要
到目前为止，模拟未能预测气动运输过程中的静电粉充电。我们通过三部分的研究提出了粉末流量充电的建模：首先，我们在金属目标上拍摄了单个颗粒，并测量了交换的电荷。其次，根据这些结果，我们制定了一个经验模型，并在CFD工具中实现了它。使用此工具，我们对粉末流的大型模拟进行了大型模拟，其中内部有圆柱形障碍物。最后，我们将模拟与气动输送测试钻机的测量进行了比较。这些模拟成功预测了粉末的充电，这些粉末由200美元的单分散粒子组成。与此类仿真的通常过程相反，该工具不需要对任何参数进行调整。根据我们的模拟，在击中圆柱障碍物时，粉末大多是充电的。触点导致双极电荷分布。
Thus far, simulations have failed to predict accurately electrostatic powder charging during pneumatic transport. We advanced the modeling of powder flow charging by a three-part study: first, we shot individual particles on a metal target and measured the exchanged charge. Second, based on these results, we formulated an empirical model and implemented it in our CFD tool. Using this tool, we performed large-eddy simulations of the powder flow through a square duct with a cylindrical obstacle inside. Finally, we compared the simulations to measurements in our pneumatic conveying test rig. The simulations successfully predicted the charging of powder consisting of monodisperse particles of a size of 200 $μ$m. Contrary to the usual procedure for this type of simulation, the tool requires no tuning of any parameters. According to our simulations, the powder mostly charged when hitting the cylindrical obstacle. The contacts led to bipolar charge distributions.
