Simulation of PMMA powder flow electrification using a new charging model based on single-particle experiments

Thus far, simulations have failed to predict accurately electrostatic powder charging during pneumatic transport. We advanced the modeling of flow by a three-part study: first, we shot individual particles on metal target and measured exchanged charge. Second, based these results, formulated an empirical model implemented it in our CFD tool. Using this tool, performed large-eddy through square duct with cylindrical obstacle inside. Finally, compared measurements conveying test rig. The successfully predicted consisting monodisperse size 200 ? m. Contrary usual procedure for type simulation, tool requires no tuning any parameters. According simulations, mostly charged when hitting obstacle. contacts led bipolar charge distributions.