Development and Application of a 3d Numerical Model for Estuary Hydrodynamics

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基本資料

Project title

Code/計畫編號

NSC100-2625-M006-001

Translated Name/計畫中文名

氣候變遷對台灣海岸之衝擊及因應策略之研擬-總計畫暨子計畫:三維河口水理數值模式之發展與應用(I)

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Co-Investigator(s)/共同執行人

黃清哲(計畫主持人)
董志明
李宗霖
蕭士俊

Department/Unit

Department of Hydraulic and Ocean Engineering,NCKU

Website

https://www.grb.gov.tw/search/planDetail?id=2335273

Year

2011

Start date/計畫起

01-08-2011

Expected Completion/計畫迄

31-07-2012

Co-Investigator(s)

Tai-Wen Hsu

Bugetid/研究經費

1263千元

ResearchField/研究領域

大氣科學
海洋科學

本文旨在發展三維數值模式探討河口水理問題。模式應用有限解析法離散求解非穩態兩相流模式的輸砂傳輸方程式，模擬河口附近的漂砂行為。描述固體邊界及追蹤複雜自由液面演變則是採用傳統等位函數法及質點等位函數法。本研究團隊自行開發的『質量守恆邊界法』則是用來模擬海底或河口底床附近的波流場演變。本計畫預計三年完成，本年度為第一年。第一年預計撰寫三維數值模式，並測試本模式模擬颱風波浪侵襲河口之波流場演變的可行性。第二年預計將三維數值模式推展至平行計算，同時撰寫並檢視二維及三維漂砂模式的適用性。第三年預計將漂砂模式引進三維數值水理模式的平行計算中，模擬在颱風暴潮與洪水影響下的河口漂砂機制，並與實際量測結果做比較，驗證本模式於實際颱風事件發生時的適用性。 The purpose of this project is to develop a 3D numerical model to investigate the hydrodynamic behaviors in the estuarine region. The finite-analytic method was applied to discretize the unsteady sediment transport equations for two-phase flows. To represent the arbitrary solid boundary and the complex free surface evolution, both the traditional level set method and the hybrid particle level set method were applied in the present model. A novel numerical scheme called the Mass-Conserved Boundary Method (MCBM) was proposed to treat the uneven seabed or the complex river course involved in the flow-structure interaction. This project will be finished within three years (from 2011/8 to 2014/7). In the first year, the 3D numerical hydrodynamic model will be developed and then applied to investigate the wave- and flow- fields near the estuary induced by typhoons. In the second year, the numerical hydrodynamic model will be recoded in parallel programming. The 2D and 3D sediment transport models will also be established and verified. In the last year, the 3D sediment transport model will be recoded in parallel programming and cooperated into the numerical hydrodynamic model. The impacts of typhoon events, including the effects of storm surge and flood, on the estuarine region will be investigated, and the results will be compared with the field monitoring data to demonstrate the validity of the present model

Keyword(s)

河口水理
漂砂
等位函數
三維數值模式
estuary hydrodynamics
sediment transport
level set method
level set method

DSpace CRIS

Development and Application of a 3d Numerical Model for Estuary Hydrodynamics

基本資料

Description