CHARACTERISTICS OF TURBULENT BOUNDARY LAYER OVER A ROUGH BED UNDER CNOIDAL WAVES MOTION
CHARACTERISTICS OF TURBULENT BOUNDARY LAYER OVER A ROUGH BED UNDER CNOIDAL WAVES MOTION
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椭球运动下粗糙床层湍流边界层特征
DOI：
10.2208/prohe.50.121
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
H. Yamaji
中科院分区：
文献类型：
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作者：
Suntoyo;Hitoshi Tanaka;Ahmad Sana;H. Yamaji
现实中的海浪在传播到浅海时往往具有强烈的非线性形状，与正弦波的距离变得非常明显。因此，人们普遍认为，实现非线性效应的波浪边界层、底部剪应力和泥沙运动行为不同于正弦波。然而，针对这类湍流边界层和泥沙输移特性的研究实例很少。因此，由正弦波动模型得到的用于评价海滩形态变化的海底剪应力和输沙量的准确性，有必要用非线性模型来澄清。本文通过实验和BSL湍流模型对非对称波或非线性波的湍流边界层特性进行了研究。此外，还采用了一种新的基于加速度和速度项的Botto m剪应力计算方法，对实验结果和BSL模型的底部剪应力结果进行了检验。
Ocean waves in reality often have a strong non-linear shape when propagating to shallow water, and the gap from the sinusoidal wave become remarkable. Therefore, it is generally believed that wave boundary layers, bottom shear stress and sediment transport behaviors actualizing the effect of non-linearity are different from sinusoidal wave. However, the example of research treating such turbulent boundary layer and sediment transport characteristic is very few. Therefore, the accuracy of bottom shear stress and amount of sediment transport used to evaluate the beach morphological change obtained from the wave motion model of sinusoidal is necessary to be clarified by that of non-linear. In this present study, turbulent boundary layer characteristics for asymmetric or non -linear waves according to the non-linearity effect is examined through both experimental and BSL turbulence model. Moreover, a new calculation method of botto m shear stress based on incorporating acceleration and velocity terms is used to examine both the experimental and BSL model results of bottom shear stress.