Experimental studies on the propagation characteristics of internal waves under complex submarine topographies
SU Meng
WANG Caixia
CHEN Haitao
WU Yuanyuan
SONG Yang
JIANG Yuanqing
BO Yuntai
SONG Qingguo
YANG Lin
Abstract：In this paper,the breakup,reflection and polarity transformation of internal waves propagating over the seabed were simulated in the flume,based on the topography of the South China Sea.Both qualitative and quantitative analyses of the evolution of the internal waves along the bottom topography were conducted by ap-plication of the dyeing technique and high-speed image recording system.It was found that the energy dissipa-tion of internal waves was related to the ridge heights and the distance between the two submarine ridges.The amplitudes(a)of the internal waves decreased after two ridges,but grew larger when propagating up the slope prior to polarity transformation.The waveforms observed in the experiments matched well with the KdV theo-ry predictions for small wave amplitude cases.For an internal wave of medium size of amplitude,the experi-mental results were in between the KdV and mKdV theory predictions.For large wave amplitude cases(a/H＞0.09),the results were more consistent with the mKdV theory.
Keywords：internal waveinternal wave-topography interactionflume experimentKdV theorymK-dV theory
Publication Date：2025-08-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 70-77 )