The wave instability pathway to turbulence
The wave instability pathway to turbulence
复制标题
波不稳定导致湍流的途径
DOI：
10.1017/jfm.2013.149
复制
发表时间：
2013
影响因子：
3.7
通讯作者：
B. Sutherland
中科院分区：
文献类型：
--
作者：
B. Sutherland
摘要大尺度海洋内波向小尺度混合传递能量的一种方式是通过参数亚谐不稳定(PSI)。但在假设波在空间和时间上是周期性的理论和现实之间存在着脱节，在现实中，波是瞬时的和局部化的。Bourget等人的创新实验室实验和分析技术。(J.Fluid Mech，Vol.723,2013，pp.1-20)表明，该理论可以用来解释准单色波束产生的亚谐扰动。他们的方法和结果开辟了通过实验、模拟和观察来研究PSI的新途径。
Abstract One way that large-scale oceanic internal waves transfer their energy to small-scale mixing is through parametric subharmonic instability (PSI). But there is a disconnect between theory, which assumes the waves are periodic in space and time, and reality, in which waves are transient and localized. The innovative laboratory experiments and analysis techniques of Bourget et al. (J. Fluid Mech., vol. 723, 2013, pp. 1–20) show that theory can be applied to interpret the generation of subharmonic disturbances from a quasi-monochromatic wave beam. Their methodology and results open up new avenues of investigation into PSI through experiments, simulations and observations.