Validation of a new generation system for bottom boundary layer beneath solitary wave
Validation of a new generation system for bottom boundary layer beneath solitary wave
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DOI：
10.1016/j.coastaleng.2011.07.003
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发表时间：
2012
影响因子：
4.4
通讯作者：
Hitoshi Tanaka;B. Winarta;Suntoyo;H. Yamaji
中科院分区：
文献类型：
--
作者：
Hitoshi Tanaka;B. Winarta;Suntoyo;H. Yamaji
了解海底边界层特性，特别是海底剪切力，是泥沙运动模拟实际应用的重要环节。本文提出了一种新的孤波作用下的底边界层生成系统。通过比较实测值和数值解速度，验证了该系统的适用性。此外，还研究了从层流到湍流的过渡行为。结果表明，实验中的临界雷诺数与Vittori和Blondeaux(2008)的计算结果以及Sumer等人的实验数据吻合较好。(2010)，表明发电系统的有效性。由于本系统可以连续测量得到集合平均量，因此它可以有效地用于未来孤立波边界层的实验研究，包括动床输沙实验。
Understanding of sea bottom boundary layer characteristics, especially bottom shear stress acting on the sea bed, is an important step needed in sediment transport modeling for practical application purposes. In the present study, a new generation system for bottom boundary layer under solitary wave is proposed. Applicability of this system is examined by comparing measured and numerical solution velocities. Moreover, transitional behavior from laminar to turbulence was investigated. It is concluded that the critical Reynolds number in the experiments shows good agreement with DNS result of Vittori and Blondeaux (2008) and laboratory data of Sumer et al. (2010), indicating validity of the generation system. Since the present generation system enables continuous measurement to obtain ensemble averaged quantities, it can be effectively utilized for future experimental studies on solitary wave boundary layers, including sediment transport experiments with movable bed.