Abstract Various inks with different properties are widely used in the printed electronic industry. In order to obtain high quality inkjet printing, it is necessary to study the droplet formation process and its influencing factors comprehensively. Only in this way, the incentive conditions and liquid physical parameters of droplet ejection can be obtained and optimized. Firstly, the calculation model of the droplet ejection process is established for a tubular print head and the boundary conditions are set according to the driving characteristics. Secondly, the free surface flow is calculated in the simulation software and sequential pictures of the droplet formation processes are captured to validate the availability of the numerical algorithm. Finally, the droplet formation processes of the tubular piezoelectric print head are simulated under different incentive conditions, different viscosities and different surface tensions. Too small a driving energy is insufficient to cause the head to eject droplets. Excessive excitation energy will result in larger or multiple satellite droplets. Additionally, the thinning process of the liquid neck is examined carefully in this paper. Results show that surface tension and viscosity have a significant effect on the thinning speed of the liquid neck, but the effect is not as significant as previous studies.

中文翻译：

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管状压电打印头液滴形成过程及其影响因素综合研究

摘要 具有不同特性的各种油墨广泛应用于印刷电子行业。为了获得高质量的喷墨打印，需要综合研究墨滴的形成过程及其影响因素。只有这样，才能得到并优化液滴喷射的激励条件和液体物理参数。首先，建立了管状打印头的液滴喷射过程的计算模型，并根据驱动特性设置了边界条件。其次，在模拟软件中计算自由表面流，并捕获液滴形成过程的连续图片以验证数值算法的可用性。最后，模拟了不同激励条件、不同粘度和不同表面张力下管状压电打印头的液滴形成过程。太小的驱动能量不足以导致头部喷射液滴。过多的激发能量将导致更大或多个卫星液滴。此外，本文仔细研究了液体颈部的细化过程。结果表明，表面张力和粘度对液颈变薄速度有显着影响，但影响不如以往研究显着。此外，本文仔细研究了液体颈部的细化过程。结果表明，表面张力和粘度对液颈变薄速度有显着影响，但影响不如以往研究显着。此外，本文仔细研究了液体颈部的细化过程。结果表明，表面张力和粘度对液颈变薄速度有显着影响，但影响不如以往研究显着。