A Three-Dimensional, Coupled Wave, Tide, and Sediment Transport Model to Study Estuarine Dynamics
报告人：周逸儒助理教授（台湾大学应用力学研究所）
报告时间：2012年2月15日上午9点（周三）
报告地点：安中大楼A322室
欢迎广大师生参加！
报告摘要
A numerical model is presented to simulate tides, waves, and suspended sediment transport in the complex estuarine system. We employ the Stanford unstructured-grid coastal model, SUNTANS, to solve hydrodynamics in the complex shoreline geometry. Within this model we implement a wind-wave model to calculate phase-averaged properties of high-frequency waves and a multiclass sediment transport model. Hydrodynamics is calculated by solving the phase-averaged Navier-Stokes equations that are coupled to the wave field through the radiation stress. Transport of multi-class cohesive suspended sediment is computed with the advection-diffusion equation with a settling velocity for each size class. Models for flocculation and break-up for mud flocs are employed to enable mass exchange between the different size classes. Suspended sediment interacts with a multilayer bed model that accounts for mud consolidation on the bed. A multilayer bed model enables calculation of wave dissipation in the presence of high-viscosity mud. Because the model allows initialization of non-uniform bed properties, sandy environments can be made to parameterize the effects of wave attenuation due to the presence of wave-dominated sand ripples. This modeling framework is the first field-scale model that integrates waves, tides, sediment, and morphology. The model is calibrated against field observations in South San Francisco Bay, and we assess the relative importance of tidal and wind forcing on suspended sediment transport.
报告人简介 周逸儒助理教授获台湾大学生物环境系统工程学系学士学位，美国麻省理工学院土木环境工程专业硕士学位，并在美国史丹福大学环境流体力学专业(副修：计算数学) 获博士学位。2009-2011年间在美国史丹福大学担任博士后研究员，自2011年开始在台大应用力学研究所担任助理教授。2010年获得香港工程师协会(HKIE)年轻工程师及科学家最佳论文奖，其研究领域包括环境流体力学、计算流体力学、紊流、多相流、海洋模式发展与应用、海洋再生能源、河川河口泥沙动力学等。