흐름장내에서 표사에 거동에 관한 연구 = A Study Sediment Transport in a Current Field

다국어 초록 (Multilingual Abstract)

The design and maintenance of navigation channel and water facilities of an harbor which is located at the mouth of river or at the estuary area are difficult due to the complexity of estuarial water and sediment circulation. Effects of deepening navigable waterways, of changing coastline configurations, or of discharging dredged material to the open sea re necessary to be investigated and predicted in terms of water quality and possible physical changes to the coastal environment.
A broad analysis of the trans mechanism in the estuary area was made in terms of sediment property, falling velocity, concentration and flow characteristics. In order to simulate the transport processes, a two-dimensional finite element model is developed, which includes erosion, transport and deposition mechanism of suspended sediments. Galerkin's weighted residual method is used to solve the transient convection-diffusion equation. The fluid domain is subdivided into a series of triangular elements in which a quadratic approximation is made for suspended sediment concentration.
Model could deal with a continuous aggregation by stipulating the setting velocity of the flocs in each element. The model provides suspended sediment concentration, bed shear stress, erosion versus deposition rate and bed profile at the given time step.

목차 (Table of Contents)

• 1.서론
• 1.1연구배경
• 1.2연구목적
• 1.3연구내용 및 방법
• 2.기초방정식
• 3.수송과정의 유한요소해석
• 3.1수송방정식의 정리
• 4.유한요소법의 적용
• 4.1요소와 형상함수
• 4.4가중잔차법(Galerkin Method)
• 4.5시간의존 문제
• 5.하구 소송에의 적용
• 2)장방형항 모델 실험 및 결과
• 6.결론 및 제언
• 참고문헌