Experimental Study on Turbulence Structures Under Breaking Waves
Experimental Study on Turbulence Structures Under Breaking Waves
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破浪作用下湍流结构的实验研究
DOI：
10.1080/05785634.1985.11924408
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发表时间：
1985
影响因子：
2.4
通讯作者：
T. Aono
中科院分区：
文献类型：
--
作者：
Masataro Hattori;T. Aono
同时测量的水面高程和欧拉水颗粒速度的破碎机区域内的溢出和暴跌破碎机条件下，在不同的位置在波浪水槽。基于水面的所有运动都是波浪运动的概念，通过数值滤波从速度时间序列数据中分离出波浪诱导速度分量和湍流速度分量。统计分析表明，破碎波引起的表面湍流对湍流的非定常和间歇结构有很大贡献。在湍流结构中的相当大的差异被发现之间溢出和暴跌断路器的湍流强度分布和频谱形式的水面高程和速度内的断路器区域。雷诺应力的空间分布表明破碎带中产生了涡状运动。通过流场观测证实了这种运动的存在。
Simultaneous measurements of the water surface elevation and Eulerian water particle velocities inside the breaker zone were performed at various locations in a wave flume for spilling and plunging breaker conditions. Based on a concept that all motion of the water surface is wave motion, separation of wave-induced and turbulent velocity components from time series data of the velocities was made by numerical filter. Statistical analyses disclosed that surface-generated turbulence due to breaking waves contributes greatly to the nonstationary and intermittent structure of turbulence. Considerable differences in the turbulence structure were found between spilling and plunging breakers in terms of turbulence intensity distribution and spectral forms for the water surface elevation and velocities inside the breaker zone. Spatial distributions of the Reynolds stress indicate the generation of vortex-like motions in the breaker zone. The existance of such motions was confirmed by means of flow visuali...