The offshore vortex train
The offshore vortex train
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近海涡流列车
DOI：
10.1017/s002211209400248x
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发表时间：
1994
影响因子：
3.7
通讯作者：
Y. Awaya
中科院分区：
文献类型：
--
作者：
N. Matsunaga;K. Takehara;Y. Awaya
当规则的表面波冲上倾斜的平坦河床时，在近海区域会形成一排二维涡旋。这种涡排被称为近海涡列。在断裂点附近，漩涡开始出现。它们向近海方向运动，通过涡旋合并发展并增加其水平长度尺度。然而，在到达特定的近海位置后，它们会迅速衰变。在三层斜坡目视实验的基础上，研究了涡列的形成区域。它的形成与破波类型无关，而是在深水波的陡度小于4.2 × 10−2时观察到的。对涡旋的水平长度尺度和涡旋运动速度也进行了经验计算。
A row of two-dimensional vortices forms in an offshore zone when regular surface waves run up a sloping flat bed. This vortex row is called the offshore vortex train. The vortices begin to appear near the breaking point. Moving in the offshore direction, they develop and increase their horizontal lengthscale through vortex merging. After reaching a particular offshore location, however, they decay rapidly. The formation region of the vortex train has been investigated on the basis of visual experiments for three bed slopes. Its formation does not depend on the type of wave breaking but is observed when the steepness of deep-water waves is smaller than 4.2 × 10−2. The horizontal lengthscale of the vortices and the velocities of the vortex movement have also been evaluated empirically.