Sediment Transport Calculation Considering Laminar and Turbulent Resistance Forces Caused by Infiltration/Exfiltration and Its Application to Tsunami-Induced Local Scouring
Sediment Transport Calculation Considering Laminar and Turbulent Resistance Forces Caused by Infiltration/Exfiltration and Its Application to Tsunami-Induced Local Scouring
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DOI：
10.1115/1.4025873
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发表时间：
2014-02
影响因子：
1.6
通讯作者：
Tomoaki Nakamura;N. Mizutani
中科院分区：
文献类型：
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作者：
Tomoaki Nakamura;N. Mizutani
提出了沉积物输送计算，该计算一致考虑了由渗透/渗漏引起的层流和湍流阻力的影响。通过对无量纲床荷沉积物输送速率的比较，发现在制定沉积物输送计算中渗透/渗滤的影响时，必须考虑层流阻力和湍流阻力。使用所提出的泥沙输运计算改进了三维耦合流体-结构-泥沙相互作用模型，并将其应用于海啸引起的内陆结构周围的局部冲刷。数值结果表明，考虑渗透/渗出提高了结构向海边缘周围形成的冲孔预测的计算精度，因此改进的模型能够以足够的精度捕获冲孔的演化。这表明改进的模型应该是评估海啸引起的局部冲刷的有用工具。
A sediment transport calculation was proposed, which consistently considered the influence of laminar and turbulent resistance forces caused by infiltration/exfiltration. From a comparison of the nondimensional bed–load sediment transport rate, it was found to be essential to consider both laminar and turbulent resistance forces when formulating the influence of infiltration/exfiltration in sediment transport calculations. A three-dimensional coupled fluid–structure–sediment interaction model was improved using the proposed sediment transport calculation, and applied to tsunami-induced local scouring around an inland structure. Numerical results showed that consideration of infiltration/exfiltration improved the computational accuracy of the prediction of a scour hole formed around the seaward edge of the structure, and accordingly the improved model could capture the evolution of the scour hole with sufficient accuracy. This suggests that the improved model should be a useful tool for assessing tsunami-induced local scouring.