Aerobreakup of Newtonian and Viscoelastic Liquids
Aerobreakup of Newtonian and Viscoelastic Liquids
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DOI：
10.1146/annurev-fluid-122109-160638
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发表时间：
2011-01
影响因子：
27.7
通讯作者：
T. Theofanous
中科院分区：
文献类型：
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作者：
T. Theofanous
在这篇综述中，我们考虑并统一了高速气流中牛顿和粘弹性液滴动力学的各个方面，包括冲击波。通过新颖的激光诱导荧光可视化打开了理解的道路，空间分辨率高达200像素毫米，曝光时间低至5 ns。Rayleigh-Taylor不稳定性和Kelvin-Helmholtz不稳定性之间竞争的核心作用是在丰富的空气动力学框架中评估的，从低亚音速到超音速，以及多种特征长度尺度和时间尺度与不同的液体性质一起发挥作用。加速和液体重新分配（液滴变形）在进化的早期阶段设置了这个竞争，我们坚持的阻力系数的解释是物理意义。两个主要的解体制度（模式的身体损失的连贯性）确定取决于气体是否找到它的方式通过液体质量，造成总解体，或去aroun…
In this review, we consider and unify all aspects of the dynamics of Newtonian and viscoelastic liquid drops in high-speed gas flows, including shock waves. The path to understanding is opened by novel, laser-induced fluorescence visualizations at spatial resolutions of up to 200 pixels for millimeter and exposure times as low as 5 ns. The central role of the competition between Rayleigh-Taylor and Kelvin-Helmholtz instabilities is assessed in the frame of rich aerodynamics, from low subsonic to supersonic, and the multitude of characteristic length scales and timescales at play with varying liquid properties. Acceleration and liquid redistribution (drop deformation) early in the evolution set the stage for this competition, and we insist on an interpretation of the drag coefficient that is physically meaningful. Two principal breakup regimes (patterns of bodily loss of coherence) are identified depending on whether the gas finds its way through the liquid mass, causing gross disintegration, or goes aroun...