Swash Zone Hydrodynamics

[00:95834 / liu]这个项目的目的是发展一种改进的模拟海滩上波浪上升的能力，即冲浪区。该项目将解决的主要影响之一是如何将海滩上自由流动的建模与可渗透海滩内流动的交换效果结合起来。该方法将结合数值模拟的努力，与加州海滩冲滩区的现场实验数据和康奈尔大学进行的实验室实验数据进行比较。建模方法是将目前用于不透水海滩上的流动的RANS模型与通过透水海滩的流动模型相结合。将努力改进海滩内流动的建模，将模拟多孔介质中的流动应用于雷诺兹平均技术。此外，将修改RANS模型的深度平均版本，以包括与可渗透海滩相互作用的参数化。实验室工作将研究孤立波和周期波串与几种类型的平面海滩的相互作用，包括光滑的不透水海滩，粗糙的不透水海滩和多孔海滩。将用于指导模型开发的现场结果来自圣地亚哥Scripps Beach和Torrey Pines Beach的实验。后一种实验是由B. Raubenheimer进行的，他在康奈尔大学与WHOI的分包合同中参与了这个项目。

0095834/LiuThe intent of this project is to develop an improved capability for modeling wave run-up on a beach, i.e. the swash zone. One of the major effects that the project will tackle is how to combine modeling of the free flow over the beach with the effects of exchange with flow within the permeable beach. The approach will combine numerical modeling efforts with comparisons to data from field experiments in the swash zone on Californian beaches and from laboratory experiments to be conducted at Cornell. The modeling approach is to combine a RANS model, presently used for flow over an impermeable beach, with a model for flow through a permeable beach. An effort will be made to improve the modeling of flow within the beach by applying an analogue of the Reynolds averaging technique to flow in porous media. In addition a depth averaged version of the RANS model will be modified to include parameterizations of the interaction with permeable beaches. The laboratory work will look at the interaction of solitary waves and periodic wavetrains with several types of planar beach including smooth impermeable, rough impermeable, and porous beaches. The field results that will be used to guide the model development are from experiments at Scripps Beach and Torrey Pines Beach in San Diego. These latter experiments were carried out by B. Raubenheimer who is collaborating in this project on a sub-contract from Cornell to WHOI.