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CONTROLLING DROP REBOUND WITH SOLID TARGET MOTION

机译:使用固体目标运动控制下降回弹

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摘要

Drops having a high surface tension and a low viscosity, such as water and molten metal drops, exhibit a vigorous recoiling and a long-lasting oscillation upon impacting with nonwetting solid surfaces. Here we report the study of controlling drop rebound using target movement. Our experimental study reveals that drop rebound is highly enhanced in such a condition that the target moves upward at the moment of impact and reverses its motion when the recoiling starts. On the other hand, an effective suppression of drop rebound is achieved by moving the target downward upon drop impact and reversing its direction well in the middle of the recoiling process. This controlling scheme of drop rebound can be employed in such practical applications as the spray deposition processes and the solder jet bumping.
机译:具有高表面张力和低粘度的液滴(例如水和熔融金属液滴)在受到不润湿的固体表面撞击时会表现出强烈的回卷和长效振荡。在这里,我们报告了使用目标运动控制下降反弹的研究。我们的实验研究表明,在目标发生撞击时向上移动并在反冲开始时反转其运动的情况下,水滴回弹会大大增强。另一方面,通过在跌落冲击时将目标向下移动并在回卷过程中很好地反转其方向,可以有效地抑制跌落回弹。这种液滴回弹的控制方案可用于诸如喷涂工艺和焊料喷射凸点的实际应用中。

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