Simulation of 3D oblique hydraulic jump by surface capturing method
Date Issued
2007
Date
2007
Author(s)
Deng, Liang-jyun
DOI
zh-TW
Abstract
It is usually found that the supercritical flow condition in river or open channel occurs at the steep-sloped reach. An oblique hydraulic jump will be generated under the supercritical flow condition through a channel contraction. During the simulation of oblique hydraulic jump using a two phase flow model, the interface band between water and air frequently expands at where the water depth changing severely, and causes the problem of water surface determination. This study is based on a 3D two phase flow model by introducing “Volume Fraction Weighted Method”, “Modified Level Set Method” and “Adapting Grid” to prevent the expanding of interface band. After the model calibration and verification, the model is applied to the simulation of the Keelung River Yuan-shan-tzi diversion work. The results show that the expanding of interface band affects the propagation of water surface significantly during numerical simulation. The proposed model can simulate the oblique hydraulic jump quite accurate, and it has the potential for further applications.
Subjects
三維斜水躍
二相流
體積分率權重法
等位函數修正法
調適性網格算則
3D oblique hydraulic jump
Two-phase flow
Volume fraction weighted method
Modified level set method
Adaptive grid
Type
thesis
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