期刊论文详细信息
Proceedings of the International Conference on Coastal Engineering | |
A MODEL OF BEACH PROFILE EVOLUTION INCLUDING WAVE-UNDERTOW INTERACTION | |
Chi Zhang2  Jinhai Zheng1  Zeki Demirbilek1  Titi Sui1  Lihwa Lin1  | |
[1]Hohai University | |
关键词: beach profile evolution; sandbar; wave; undertow; numerical model; | |
DOI : 10.9753/icce.v33.sediment.16 | |
学科分类:建筑学 | |
来源: Coastal Engineering Research Council | |
![]() |
【 摘 要 】
A numerical model of beach profile evolution is developed to study the onshore and offshore sandbar migration under different wave conditions. The integrated model consists of wave model, roller model, flow model, sediment transport model and bed evolution model. In particular, the interaction between waves and wave-induced undertow current is considered in the flow model. This is achieved by adding a mean pressure gradient term into the firs-order momentum balance equation of flow. A simple empirical method is also introduced to describe the variation in eddy viscosity during one wave cycle. A preliminary application of the present model shows good agreements of both onshore and offshore sandbar migration phenomenon with the laboratory observation. It is found that the offshore sandbar migration is dominated by undertow while wave affects the transport rate. For the onshore sandbar migration, although sediment transport is mainly driven by wave and the undertow is weak, the transport pattern is considerably modified by undertow. It is shown that the combined effects of wave and undertow are important in beach profile evolution.【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201912020442144ZK.pdf | 463KB | ![]() |