数値シミュレーションに基づく平行電極板分級装置を用いたPM2.5帯電分布の推定

抄録

In this study, we propose a new method to determine the charge distribution of PM2.5 using a Parallel-Plate Particle Separator (PPPS), and discuss the influence of various conditions for the method on its accuracy by using numerical simulation. The PPPS separates particles flowing from the central inlet into three exits based on their electrical mobility. The proposed method reconstructs the charge distribution from two parameters under various sets of various applied voltage: the numbers of particles flowing out to each exit of PPPS; the ratio of outflow particles to inlet particles for each charge number. The charge distribution determined by the proposed method under 2 digits, which are the significant figures in experiments, or more is found to excellently agree with input distribution. The parametric study shows that the accuracy of the determination improves when both the flow field and the set of applied voltages are optimized.