关键词: 静电喷雾, 数值模拟, 预测模型, 沉积半径, 电场力

Abstract:

The preparation of thin films by electrostatic spraying is one of the emerging nanomaterial preparation processes in recent years. It has attracted wide attention because of its simple process, high material utilization and strong surface adaptability. As an important index for evaluating spraying quality and production efficiency, spraying area is easily affected by parameters such as applied voltage, solution properties, spraying distance, etc., and is difficult to accurately control in the relevant production process. In order to solve this problem, a mathematical model for predicting the radius of electrostatic spray deposition was proposed. The electrostatic spray plume was equivalent to a space charge field by Gauss’s law, and then the force analysis of the droplets outside the plume was carried out, and the expansion radius of the spray plume at different positions was obtained, which was the deposition radius of the electrostatic spray. The comparison showed that the model was in good agreement with the related results. Compared with the traditional Lagrangian method and experimental method, the model can quickly predict the spray area under various working conditions to provide guidance for industrial production operations and atomizer design.

Key words: electrospray, numerical simulation, prediction model, deposition radius, electric force