Collaborative Research: ITR- (ASE+EVS)-(dmc+sim): Coastal Modeling and Management

项目编号：CTS-047014,0426811,0427115研究人员：P.Lynett，B.Raubenheimer，P.Liuinstation：德克萨斯A&M大学，伍兹霍尔海洋研究所，康奈尔大学合作：ITR海岸建模和管理这笔赠款的目标是开发一个耦合的、混合的水动力计算模型，用于模拟和预测从深海到海岸线的复杂水波过程。该模型将是物理上全面的，总域尺度在数百公里量级，但近岸网格分辨率不到一米。为了包括这种大范围的比例尺，许多不同的流体动力学模型将被整合在一起，这些模型具有各种但重叠的物理和实际约束，以创建一个混合流体动力学软件工具。连接不同流体力学模型的方法将建立在分布式计算技术中，从而允许利用计算机集群资源。此外，混合系统中的每个单独模型都将被并行化，从而创建一个大规模并行的分布式仿真平台。与混合水动力模型相结合的将是泥沙输运公式，以便可以模拟近岸的地形变化(即海滩侵蚀)。这些公式将使用水动力模式的高分辨率和高保真波浪强迫，包括破碎、冲浪和激流区域中强烈湍流的影响。耦合模型的验证将使用来自实地研究和对照实验的已建立的数据集。为在各种耦合模型之间传递信息而开发的技术基础设施将是透明和可扩展的，以便随着更复杂的模型变得可用，它们可以插入现有的模拟器。该模拟器将被执业工程师用于海岸保护措施的设计，以及可能需要更好地估计极端事件造成的波浪影响和侵蚀的政策制定者。通过影响未来的设计和政策决策，模拟器将有助于实现可持续沿海边缘的目标。将通过揭开基于网络的、开放获取的沿海模拟器的面纱来完成教育和宣传。该网站将完全免费访问，对大学生和高中生以及学者和工程师开放。海岸模拟器将远程用于高级海岸工程设计课程。通过与这里开发的高精度模型进行比较，能够向这些学生第一手展示常用工程工具中的不确定程度和可能的错误，这将产生巨大的影响，使他们在成为实习工程师时能够更好地解释预测。由化学与运输系统、流体动力学与水力(FDH)计划和海洋科学部(OCE)共同资助。

ABSTRACTPROPOSAL NO.: CTS-047014, 0426811, 0427115PRINCIPAL INVESTIGATORS: P. LYNETT, B. RAUBENHEIMER, P. LIUINSTITUTION: TEXAS A&M UNIVERSITY, WOODS HOLE OCEAN INST., CORNELL UNIVERSITY COLLABORATIVE: ITR COASTAL MODELING AND MANAGEMENTThe goal of this grant to develop a coupled, hybrid hydrodynamic computational model for simulation and prediction of complex water wave processes from the deep ocean to the shoreline. The model will be physically comprehensive, with total domain scales on the order of hundred's of kilometers, yet with a nearshore grid resolution less than a meter. To include this great range of scales, a number of diverse hydrodynamic models, with various but overlapping physical and practical constraints, will be integrated to create a hybrid hydrodynamic software tool. The method of interfacing the different hydrodynamic models will be founded in distributed computing techniques, thereby allowing for utilization of computer cluster resources. In addition, each of the individual models in the hybrid system will be parallelized, leading to the creation of a massively parallel and distributed simulation platform. Coupled with the hybrid hydrodynamic model will be sediment transport formulations, such that morphological change in the nearshore (i.e. beach erosion) can be simulated. These formulations will employ the fine resolution and high fidelity wave forcing from the hydrodynamic model, including the effects of strong turbulence in the breaker, surf, and swash zones. Validation of the coupled model will use established datasets from field studies and controlled experiments. The technology infrastructure developed to pass information between the various coupled models will be transparent and expandable, such that as more sophisticated models become available, they may be plugged into the existing simulator. The coupled simulator will be utilized by practicing engineers for design of coastal protection measures and by policy makers who may need better estimations of wave impact and erosion due to extreme events. By influencing future design and policy decisions, the simulator will contribute towards the goal of sustainable coastal margins. Education and outreach will be accomplished through the unveiling of a web-based, open access, coastal simulator. The website will be completely free access, open to college and high school students, as well as academics and engineers. The coastal simulator will be used remotely for senior level coastal engineering design classes. It would be of immense impact to be able to show these students first-hand the level of uncertainty and possible error in common engineering tools through comparison with the high accuracy model developed here, such that they are in a much better position to interpret the predictions when they become practicing engineers. Jointly funded by the Division of Chemical & Transport Systems, Fluid Dynamics & Hydraulics (FDH) program, and the Division of Ocean Sciences (OCE).