发表机构
Okinawa Institute of Science and Technology Graduate University; Finnish Meteorological Institute; University of Oxford（冲绳科学技术大学院大学; 芬兰气象研究所; 牛津大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究直受限几何中弹性湍流，发现管道与圆管均存在持续混沌动力学且对应同一弹性湍流态，确立其为几何无关吸引子，揭示圆管独特转变机制。
AI 中文摘要
弹性湍流（ET）在直几何中已在周期性剪切、平面通道流等理想化构型中被广泛研究，但实验通常局限于管道、圆管等受限系统。在管道中虽观测到混沌弹性波动，但其在圆管中的触发因几何约束存在争议。本文报道两种几何中均存在持续混沌动力学，且对应理想化装置中识别的同一ET态。结果确立ET为与几何无关的吸引子，并指出圆管中存在独特的转变机制。
英文摘要
Elastic turbulence (ET) in straight geometries has been extensively studied in idealised configurations such as periodic shear and planar channel flow, yet experiments are typically restricted to confined systems like ducts and pipes. While chaotic elastic fluctuations are observed in ducts, their onset in pipes is debated due to geometric constraints. Here we report sustained chaotic dynamics in both geometries and show they correspond to the same ET state identified in idealised setups. Our results establish ET as a geometry-independent attractor and point to a distinct transition mechanism in pipes.
Comments6+2 pages, 5+4 figures
