This paper aims at addressing issues related to the misrepresentation of the turbulent stratified flow for sand wave simulation using the continuum coupled flow and morphodynamics modeling approach. continuum flow and morphodynamics frameworks often consider the contributions of (i) suspended sediment-load in the sediment mass-balance equation and (ii) stratification in the equations of fluid motion. We argue that omitting these contributions could impact the numerical simulation results of transverse sand wave development at the late stages of bed evolution. We support our argument by presenting a numerical analysis, which attempts to quantify the impact of the stratification and suspended sediment-load on the calculated bed topography during various stages of transverse sand wave evolution in a mobile bed flume.

本文旨在利用连续流耦合和形态动力学建模方法，解决与砂波模拟中湍流分层流的误表示有关的问题。连续流和形态动力学框架经常考虑（i）沉积物质量平衡方程中的悬浮沉积物负荷和（ii）流体运动方程中的分层。我们认为，忽略这些贡献可能会影响砂床演化后期横向沙波发展的数值模拟结果。我们通过提供一个数值分析来支持我们的观点，该数值分析试图量化在移动床水槽中横向砂波演化的各个阶段中，分层和悬浮泥沙量对计算床形貌的影响。