Entrainment in bottom gravity currents over complex topography from three‐dimensional nonhydrostatic simulations
Entrainment in bottom gravity currents over complex topography from three‐dimensional nonhydrostatic simulations
复制标题
三维非静水力模拟中复杂地形上底部重力流的夹带
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
T. Iliescu
中科院分区：
文献类型：
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作者：
T. Özgökmen;P. Fischer;Jinqiao Duan;T. Iliescu
通过认识到海洋溢流遵循海底形态，在100 km至1 m的空间尺度上显示出自相似结构，使用3D非静力谱元模型研究了地形隆起对重力流夹带的影响。据发现，一个凹凸不平的表面可以导致一个显着的增强夹带相比，一个光滑的表面。夹带的变化被参数化为颠簸相对于背景斜率的振幅和波数参数的统计估计的函数。
By recognizing that oceanic overflows follow the seafloor morphology, which shows a self‐similar structure at spatial scales ranging from 100 km to 1 m, the impact of topographic bumps on entrainment in gravity currents is investigated using a 3D nonhydrostatic spectral element model. It is found that a bumpy surface can lead to a significant enhancement of entrainment compared to a smooth surface. The change in entrainment is parameterized as a function of statistical estimates of the amplitude and wavenumber parameters of bumps with respect to the background slope.