论文标题
渐近阻力减少的非扰动弹性催化性湍流
Nonasymptotic elastoinertial turbulence for asymptotic drag reduction
论文作者
论文摘要
聚合物诱导的阻力减少受到最大阻力减少（MDR）的渐近极限。数十年来，研究人员认为MDR反映了与聚合物没有进一步改变的最终流量状态的收敛。我们的仿真表明，随着拖放的收敛到其不变极限，潜在的动力学继续发展而没有收敛迹象。渐近阻力减少的阶段并未由任何单个流量状态表示，而包括具有不同动力学模式的状态，所有这些状态都由聚合物弹性所部分维持。
Polymer-induced drag reduction is bounded by an asymptotic limit of maximum drag reduction (MDR). For decades, researchers have presumed that MDR reflects the convergence to an ultimate flow state that is not further changed by polymers. Our simulation shows that, as drag reduction converges to its invariant limit, the underlying dynamics continues to evolve with no sign of convergence. The stage of asymptotic drag reduction is not represented by any single flow state, but encompasses states with varying dynamical patterns, all of which are partially sustained by polymer elasticity.
