The present work presents the behavior of a liquid drop placed onto a surface of the perforated plate experimentally. Micro holes were created on the brass plate by a laser marking method. The actuator made of brass and piezoelectric discs driven by a sine input voltage, and it bonded rigidly to the perforated plate. This study aimed to reveal the behavior of the drop placed on the perforated plate and the effects of the initial acceleration value on the rate of change in the drop projected area onto the surface. For this purpose, a frequency-response function of the dry micro-perforated plate was measured by a laser vibrometer, and the acceleration distribution was determined on the perforated plate. Further, the drop was excited with five different initial acceleration values, and the drop projected area onto the surface was recorded by a camera during the atomization process. It was observed that droplets were atomized at the air–liquid interface on two sides of the perforated plate. The time-varying function of the drop projected area onto the surface for each initial acceleration value was presented graphically. The polynomial function was fitted to the experimental data points for each acceleration value, and thus the effects of the initial acceleration on the varying drop size were analyzed. The authors emphasized that the drop projected area onto the surface first increased and then decreased during the atomization process. The rate of change in the drop projected area onto the surface increased as the initial acceleration increased. The drop was atomized both by ejecting from the surface and sucking through the holes.

中文翻译：

---

振动微孔板上液滴的动力学

本工作通过实验展示了液滴在多孔板表面上的行为。通过激光打标方法在黄铜板上形成了微孔。由正弦输入电压驱动的黄铜和压电盘制成的执行器，它牢固地粘结在穿孔板上。这项研究旨在揭示放置在多孔板上的液滴的行为以及初始加速度值对液滴投影到表面的面积变化率的影响。为此，通过激光振动计测量干燥的微穿孔板的频率响应函数，并确定穿孔板上的加速度分布。此外，用五种不同的初始加速度值激发了液滴的下落，在雾化过程中，照相机将液滴投影到表面上的面积记录下来。观察到，在多孔板两侧的气液界面处，雾滴被雾化了。对于每个初始加速度值，将液滴投影到表面上的投影区域的时变函数以图形方式呈现。将多项式函数拟合到每个加速度值的实验数据点，从而分析了初始加速度对变化的液滴大小的影响。作者强调说，在雾化过程中，液滴投影到表面的面积先增大然后减小。随着初始加速度的增加，液滴投影到表面上的面积的变化率增加。