COMPUTATION OF LONGSHORE CURRENTS
COMPUTATION OF LONGSHORE CURRENTS
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沿岸海流的计算
DOI：
10.9753/icce.v14.40
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发表时间：
1974
期刊：
影响因子：
--
通讯作者：
T. S. Jacobsen
中科院分区：
文献类型：
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作者：
I. G. Jonsson;O. Skovgaard;T. S. Jacobsen
预测了规则斜向入射破碎波在任意平行底轮廓线上引起的沿岸流的稳态剖面。采取了一种势头办法。波浪参数必须在碎波带以外的深度处给出，此处流速非常小。必须预先规定底部粗糙度沿着给定底部轮廓的变化。深度折射也包括在波浪沉降和增升的计算中。不包括海流折射和裂流。该模型包括两个新的表达式，一个用于计算湍流横向混合，一个用于湍流底部摩擦。底部摩擦力项是非线性的。快速收敛的数值算法描述的控制方程的解决方案。预测的电流分布与实验室实验和现场测量进行了比较。对于一个平面倾斜的底部，不同的涡粘性和底部粗糙度的常数值的影响进行了研究。
The steady state profile of the longshore current induced by regular, obliquely incident, breaking waves, over a bottom with arbitrary parallel bottom contours, is predicted. A momentum approach is adopted. The wave parameters must be given at a depth outside the surf zone, where the current velocity is very small. The variation of the bottom roughness along the given bottom profile must be prescribed in advance. Depth refraction is included also in the calculation of wave set-down and set-up. Current refraction and rip-currents are excluded. The model includes two new expressions, one for the calculation of the turbulent lateral mixing, and one for the turbulent bottom friction. The term for the bottom friction is non-linear. Rapid convergent numerical algorithms are described for the solution of the governing equations. The predicted current profiles are compared with laboratory experiments and field measurements. For a plane sloping bottom, the influence of different eddy viscosities and constant values of bottom roughness is examined.