We study the fully coupled dynamics between a fully developed turbulent flow and an ensemble of immersed flexible fibers. We vary the concentration of the suspension, the mechanical properties, and the length of the fibers in a vast parametric range. For all configurations, the fiber dynamics falls in only two possible dynamical states: (i) the fiber manifests its natural response to the flow forcing or (ii) its motion fully synchronizes to the hydrodynamic timescales of the turbulent flow. This scenario holds for both a dilute condition, where the carrier flow is not affected by the fluid–structure interaction, as well as in the case where the flow is substantially altered by the presence of immersed objects. Such a backreaction effect can be macroscopically modeled in terms of the mass fraction of the suspension. Our results can be readily extended to any elastic objects interacting with fluid turbulence.

中文翻译：

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弹性纤维在调制湍流中的普遍扑动状态

我们研究了完全发展的湍流和浸入式柔性纤维集合之间的完全耦合动力学。我们在广泛的参数范围内改变悬浮液的浓度、机械性能和纤维长度。对于所有配置，纤维动力学仅处于两种可能的动力学状态：（i）纤维表现出其对流动强迫的自然响应或（ii）其运动与湍流的流体动力学时间尺度完全同步。这种情况适用于稀释条件，其中载流子流动不受流固耦合影响，以及流动因浸入物体的存在而显着改变的情况。这种逆反应效应可以根据悬浮液的质量分数进行宏观建模。