The electrohydrodynamic atomization (EHDA) process is a method of forming liquid droplets or jets in a solution under an electric field. Molecular dynamics simulations were used in this study to reveal the EHDA dripping mode at a microscopic level. In this study, we investigated whether a liquid contains ions under the influence of a 1 V·nm−1 electric field that affects the dipole direction of water molecules to explore the cause of the dripping mode. It was hypothesized that the presence of ions would disrupt the local electric field distribution, causing liquid rupture. Furthermore, we observed the jetting behavior under varying ion concentrations and identified jetting instability. To solve this problem, the pre-load voltage method was used to control the distribution of ions in the solution, thus effectively increasing the ion concentration at the nanotube opening. In this study, we also investigated the movement behavior of ions in solution under different pre-load voltages, leading to a stable dripping mode under different ion concentrations. This study offers microscale mechanism research perspectives for EHDA and can be used in future studies for parameter setting and optimization.

中文翻译：

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电流体雾化的分子动力学模拟：通过预加载电压实现稳定的滴注模式

电流体动力雾化（EHDA）过程是一种在电场下在溶液中形成液滴或射流的方法。本研究使用分子动力学模拟在微观水平上揭示了 EHDA 滴落模式。在这项研究中，我们研究了在 1 V·nm 的影响下液体是否含有离子。−1影响水分子偶极子方向的电场，探讨滴水模式的原因。据推测，离子的存在会破坏局部电场分布，导致液体破裂。此外，我们观察了不同离子浓度下的喷射行为并确定了喷射不稳定性。针对这一问题，采用预加载电压的方法来控制溶液中离子的分布，从而有效提高纳米管开口处的离子浓度。在本研究中，我们还研究了不同预加载电压下溶液中离子的运动行为，从而在不同离子浓度下形成稳定的滴落模式。本研究为EHDA提供了微观机制研究视角，可用于未来的参数设置和优化研究。