Abstract

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.

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