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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Experimental Investigation of Dispersive Shock Waves in Shallow Water
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Experimental Investigation of Dispersive Shock Waves in Shallow Water

机译：APS-流体动力学APS部门第70届年会-事件-浅水中分散冲击波的实验研究

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Supersonic flow past a slender wedge is a canonical problem of interest in compressible fluid dynamics. However, the experiments are extremely delicate and require experimental expertise. Simpler experiments in which supercritical shallow water flows past a wedge have been implemented under the auspice of the hydraulic analogy. In doing so, the resulting shock was found to be an oscillatory, steady pattern now understood to be an oblique dispersive shock wave (DSW), paralleling similar phenomena in nonlinear fiber optics, ultra-cold atoms, and internal and surface water waves. We implement a similar shallow water experiment in which a sluice gate controls the shallow flow at supercritical velocities that are deflected by a slim wedge. By measuring phase shifts in a sinusoidal fringe pattern projected on the water surface we can reconstruct a surface profile using the Fourier Transform Profilometry technique. The experimental setup and image processing will be detailed and illustrative experimental surface wave profiles will be given.
机译：通过细长楔形的超音速流是可压缩流体动力学中的一个典型问题。但是，实验极其精细，需要实验专业知识。在水力类比的支持下，已经进行了一些简单的实验，其中超临界浅水流过楔子。通过这样做，发现产生的冲击是一种振荡的，稳定的模式，现在被理解为斜向分散的冲击波（DSW），与非线性光纤，超冷原子以及内部和表面水波中的类似现象平行。我们实施了类似的浅水实验，其中水闸控制超薄楔形件偏转的超临界速度下的浅水流。通过测量投影在水面上的正弦条纹图案的相移，我们可以使用傅立叶变换轮廓分析技术重建表面轮廓。将详细描述实验装置和图像处理，并给出说明性实验表面波轮廓。

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