We report instability of a superheated granular layer when a droplet is deposited on top of the layer. We find that the instability caused by evaporating vapor may trap or cause the droplet to sail away from the deposited position. The sailing motion is triggered by an unstable pressure distribution originated from fast fluidization of metallic grains. We provide a predictive model and experimental verification of the enabling conditions for sailing motion based on limiting criteria for fast fluidization.

中文翻译：

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过热颗粒层中的航行液滴

当液滴沉积在层的顶部时，我们报告了过热颗粒层的不稳定性。我们发现，由蒸发蒸气引起的不稳定性可能会捕获或导致液滴从沉积位置起航。航行运动是由金属颗粒快速流化产生的不稳定压力分布触发的。我们基于快速流态化的限制标准，为航行运动的启用条件提供了预测模型和实验验证。