title: Band gaps and localization of surface water waves over large-scale sand waves with random fluctuations.
abstract: 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.
authors.affiliation: Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, Xiamen University, Xiamen, China. yuzhang@xmu.edu.cn
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Shao
authors.forename: Yaozhao
authors.initials: Y
authors.lastname: Zhong
authors.forename: Sai
authors.initials: S
authors.lastname: Zhang
authors.forename: Zongxi
authors.initials: Z
authors.lastname: Zhao
mesh_terms: D003198:Computer Simulation; D015233:Models, Statistical; D012212:Rheology / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*; D014872:Water Movements
chemical_list: D014867:Water; D012822:Silicon Dioxide