论文标题
弹性湍流的重新层压
Re-laminarization of elastic turbulence
论文作者
论文摘要
我们报告了减少摩擦阻力和弹性湍流（ET）在粘弹性通道中消失的惯性（ET）的完整流量重新延迟。我们表明，观察到的弹性波和壁正常涡度的强度与在ET发作上方的测量阻力良好相关。此外，我们发现弹性波频率随魏森堡的数量而增长，并且在足够高的频率下会导致弹性波的衰减，从而导致ET衰减和拖动减少。因此，这使我们能够证实一种物理机制，涉及弹性波与壁正常涡度波动的相互作用，从而导致较低雷诺数下的阻力减少和重新层压现象。
We report frictional drag reduction and a complete flow re-laminarization of elastic turbulence (ET) at vanishing inertia in a viscoelastic channel flow past an obstacle. We show that intensity of observed elastic waves and wall-normal vorticity correlate well with the measured drag above the ET onset. Moreover, we find that the elastic wave frequency grows with Weissenberg number, and at sufficiently high frequency it causes decay of the elastic waves, resulting in ET attenuation and drag reduction. Thus, this allows us to substantiate a physical mechanism, involving interaction of elastic waves with wall-normal vorticity fluctuations, leading to the drag reduction and re-laminarization phenomena at low Reynolds number.
