Patches of turbulence in straight pipe flow (‘puffs’) display collective dynamics that is not well understood. Now, this dynamics is shown to harbour a phase transition of the directed percolation type, displaying jamming at high puff density.

中文翻译：

---

 气喘吁吁地走着


直管流（“喷流”）中的片状湍流显示出尚未被充分理解的集体动态。现在，这种动力学被证明存在定向渗流类型的相变，在高烟气密度下表现出干扰。