In this work, droplets bouncing on curved surfaces with elevated temperatures are reported. The bouncing and depositing phenomena of different lubricant droplets are confirmed. The influence of initial diameter, tangential velocity, and surface roughness on the impact dynamics of silicone oil droplets on wetted curved surfaces is investigated, and the temperature dependence of the bouncing phenomenon is highlighted. Bouncing and depositing thresholds under various conditions are summarized. It is found that surface roughness has the most significant negative effect on the bounceable velocity range, followed by initial diameter and tangential velocity. A theoretical model and force analysis are established to explain the bouncing mechanism. The modified Bond numbers and Ohnesorge numbers are introduced to predict the bouncing thresholds. This work provides sufficient experimental and theoretical insights into manipulating droplets bouncing on wetted and curved surfaces with elevated temperatures.

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