Head-on collisions between droplets and spherical particles are examined for water droplets in the diameter range between 170 μm and 280 μm and spherical particles in the diameter range between 500 μm and 2000 μm. The droplet velocities range between 6 m/s and 11 m/s, while the spherical particles are fixed in space. The Weber and Ohnesorge numbers and ratio of droplet to particle diameter were between 92 < We < 1015, 0.0070 < Oh < 0.0089, and 0.09 < Ω < 0.55, respectively. The droplet-particle collisions are first quantified in terms of the outcome. In addition to the conventional deposition and splashing regimes, a regime is observed in the intermediate region, where the droplet forms a stable crown, which does not breakup but propagates along the particle surface and passes around the particle. This regime is prevalent when the droplets collide on small particles. The characteristics of the collision at the onset of rim instability are also described in terms of the location of the film on the particle...

中文翻译：

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液滴在球形颗粒上的碰撞

针对直径在 170 μm 和 280 μm 之间的水滴和直径在 500 μm 和 2000 μm 之间的球形颗粒，检查了液滴和球形颗粒之间的正面碰撞。液滴速度介于 6 m/s 和 11 m/s 之间，而球形颗粒固定在空间中。Weber 和 Ohnesorge 数以及液滴与粒径的比率分别介于 92 < We < 1015、0.0070 < Oh < 0.0089 和 0.09 < Ω < 0.55 之间。首先根据结果对液滴-粒子碰撞进行量化。除了传统的沉积和飞溅机制之外，在中间区域还观察到一个机制，其中液滴形成稳定的冠部，不会破裂而是沿着颗粒表面传播并绕过颗粒。当液滴与小颗粒碰撞时，这种方式很普遍。边缘不稳定开始时的碰撞特征也用薄膜在粒子上的位置来描述......