纯弹性-塑性湍流在剪切流中的出现
Emergence of Purely Elasto-Plastic Turbulence in Shear Flows
AI总结：
研究发现，在无惯性条件下，具有屈服应力的流体中出现纯弹性-塑性湍流，揭示了弹性与塑性在简单剪切流中的复杂相互作用。
摘要：
我们在无惯性条件下观察到一种独特的、由弹性驱动的流态在具有屈服应力的流体中出现。数值模拟显示，这种弹性-塑性湍流状态以速度和应力的广泛波动谱为特征。结果显示，未屈服流体的体积分数与塑性之间存在非单调关系。令人惊讶的是，我们发现当塑性超过临界值时，系统可以流化。我们的结果揭示了简单剪切流中弹性与塑性之间复杂的相互作用，表明塑性可以增强而不是阻碍动量传输。
英文摘要：
We observe the emergence of a distinct, elasticity-driven flow state in a yield-stress fluid in the absence of inertia. Numerical simulations show that this elasto-plastic turbulent state is characterized by a broad spectrum of fluctuations in velocity and stress. Results show a non-monotonic relationship between the volume fraction of the unyielded flow and plasticity. Surprisingly, we find that above a critical value of plasticity, the system can fluidize. Our results reveal the complex interplay between elasticity and plasticity in simple shear flows, indicating that plasticity can enhance rather than hinder momentum transport.
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