When a container filled with granular material is subjected to vertical vibration in the presence of gravity, under certain conditions a non-monotonous density profile can be observed. This effect which is characteristic for dissipative granular gases, was termed “floating cluster regime” or “granular Leidenfrost effect”. Here, we study the behavior of vibro-agitated granular matter in the absence of gravity and identify a corresponding stationary state of the granulate, that is, we provide experimental evidence of the granular Leidenfrost effect under conditions of weightlessness.

中文翻译：

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微重力下的莱顿霜颗粒效应

当装有颗粒材料的容器在重力作用下经受垂直振动时，在某些条件下可以观察到非单调的密度分布。这种具有耗散性颗粒气体特征的效应被称为“浮动团簇状态”或“粒状莱顿弗罗斯特效应”。在这里，我们研究了在没有重力的情况下振动搅动的颗粒物的行为，并确定了颗粒的相应静止状态，即，我们提供了在失重条件下颗粒莱顿弗罗斯特效应的实验证据。