Influence of lateral boundaries on transport in quasi-two-dimensional flow.
Influence of lateral boundaries on transport in quasi-two-dimensional flow.
复制标题
横向边界对准二维流中传输的影响。
作者：
L. Fang;N. Ouellette
我们使用传递算子方法评估了类似海岸线的横向边界对实验室准二维湍流中混合和传输的影响。我们检查由传递算子的奇异向量定义的流中最相干的集合，作为表征其混合属性的一种方式。我们研究了三种模型海岸线形状：均匀边界、尖锐海湾和尖锐岬角。在这三者中，我们表明，岬角会影响流域深处的混合，因为它倾向于将传输障碍固定在其尖端。我们的结果可能会对排入海洋的沿海设施的选址产生影响。
We assess the impact of lateral coastline-like boundaries on mixing and transport in a laboratory quasi-two-dimensional turbulent flow using a transfer-operator approach. We examine the most coherent sets in the flow, as defined by the singular vectors of the transfer operator, as a way to characterize its mixing properties. We study three model coastline shapes: a uniform boundary, a sharp embayment, and a sharp headland. Of these three, we show that the headland affects the mixing deep into the flow domain because it has a tendency to pin transport barriers to its tip. Our results may have implications for the siting of coastal facilities that discharge into the ocean.