The study of the dividing wall for a merged flow of two open channels
Date Issued
2014
Date
2014
Author(s)
Chen, Hsiao-Ching
Abstract
The cause of open channel flooding includes contraction, insufficient height of embankment, inappropriate merged angle, etc. Among the above circumstance, some of the problems can be solved by cleanout or pumping, but the most complicated problem is inappropriate merged angle, it will face land expropriation for river changing. Another choice is to construct a dividing wall in the channel which is the main issue of the research.
The design of dividing wall for merged flow can extend the intersection point to downstream, relative uniform flow, avoiding disturbing each side water. Planning dividing wall can follow the steps below: First, use Schwarz-Christoffel transformation to find analytical solution of dividing wall position. Second, calculate the pressure of dividing wall by BEM of 2D potential problems and solve degenerate boundary problems. Or, simulate the action between fluid and wall by depth-averaged sallow water model.
For the purpose of combining the research with practice, the research will discuss the case of confluence between Zhonggang chnnel and Quizikeng river. As a sequence describe before, the optimal dividing wall can be found. Furthermore, the study successfully propose a way to improve present dividing wall by using porous material, having the property of dissipating pressure.
Subjects
隔離牆
施瓦茲─克里斯托夫轉換理論
二維勢流邊界元素法
水深平均之淺水流模式
多孔介質
Type
thesis
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