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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Dispersal of seeds from splash-cup plants
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Dispersal of seeds from splash-cup plants

机译：APS-APS流体动力学部第70届年会-活动-飞溅杯植物种子的散播

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Splash cup plants disperse their seeds with the help of raindrops. The seeds sit in a small (mm-scale) conical cup and are ejected upon drop impact. The seeds are ejected at velocities up to five times the impact speed of the raindrop, and are dispersed up to 1 m away from the parent plant, which is only a few cm high. Previous work investigating the mechanism of this remarkable dispersal predicted an optimum cup opening angle of around 40extdegree , which matched reasonably well with experiments performed with 3D-printed splash cup models. Those experiments were done with off-center drop impacts on initially empty cups with no seeds. We discuss similar experiments for cups that are not initially empty, but rather contain seed mimics, water, or both seeds and water. For some of these realistic initial states results are strikingly different from empty cups. Connections to theory will also be discussed.
机译：飞溅杯植物借助雨滴分散种子。种子放在一个小（毫米级）的锥形杯中，并在跌落冲击时被弹出。种子以高达雨滴撞击速度五倍的速度射出，并散布在距离只有几厘米高的亲本植物最远1 m处。先前对这种显着分散机理进行研究的工作预测，最佳杯开口角约为40extdegree，这与3D打印喷溅杯模型进行的实验相当吻合。那些实验是在最初没有种子的空杯子上进行偏心滴落冲击而完成的。我们讨论了类似的实验，这些实验最初不是空的，而是包含种子模拟物，水或种子和水两者。对于某些现实的初始状态，结果与空杯子明显不同。也将讨论与理论的联系。

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