Band gaps and localization of surface water waves over large-scale sand waves with random fluctuations.
Band gaps and localization of surface water waves over large-scale sand waves with random fluctuations.
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DOI：
10.1103/physreve.85.066319
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发表时间：
2012-06
期刊：
影响因子：
--
通讯作者：
Yu Zhang;Yan Li;Hao Shao;Yaozhao Zhong;Sai Zhang;Zongxi Zhao
中科院分区：
文献类型：
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作者：
Yu Zhang;Yan Li;Hao Shao;Yaozhao Zhong;Sai Zhang;Zongxi Zhao
研究了大尺度沙波地形上海面水波的频带结构和波的局部化。沙波高度、沙波宽度、水深和相邻沙波之间的水宽对带隙有显著影响。沙波高度、沙波宽度和水深的随机波动会引起水波局部化。然而，随机水宽在一定频率下产生一个完美的水波传输隧道，因此无论施加多大的无序能级，都不会发生局部化。结合理论结果，台湾浅滩的现场实验观测结果表明，带隙和波局部化是海面水波在天然大尺度沙波上传播的物理机制。
Band structure and wave localization are investigated for sea surface water waves over large-scale sand wave topography. Sand wave height, sand wave width, water depth, and water width between adjacent sand waves have significant impact on band gaps. Random fluctuations of sand wave height, sand wave width, and water depth induce water wave localization. However, random water width produces a perfect transmission tunnel of water waves at a certain frequency so that localization does not occur no matter how large a disorder level is applied. Together with theoretical results, the field experimental observations in the Taiwan Bank suggest band gap and wave localization as the physical mechanism of sea surface water wave propagating over natural large-scale sand waves.