Numerical simulation of landslide generated impulse waves based on Herschel-Bulkley rheological model

被引：0
作者：
Xue H. [1 ,2 ]
Ma Q. [3 ]
Peng X. [1 ]
Chen M. [1 ,2 ]
Diao M. [4 ]
机构：
[1] National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing
[2] Ministry of Education Key Laboratory of Water Conservancy and Water Transportation Engineering, Chongqing Jiaotong University, Chongqing
[3] Southwest Waterway Engineering Institute, Chongqing Jiaotong University, Chongqing
[4] State Key Lab of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2023年 / 54卷 / 03期
关键词：
landslide generated impulse waves; mountain reservoir; numerical simulation; resistance model; rheological model;
D O I：
10.13243/j.cnki.slxb.20220817
中图分类号：
学科分类号：
摘要：
Landslide generated impulse waves in mountain reservoirs may cause severe threaten to the safety of navigation, hydraulic structures and people living along the bank. Therefore, it is of great importance to predict and prevent such secondary disasters. However, the dynamic process of landslide surge is very complex. Accurate simulation of it has been a top research topic recently. In this paper, the landslide is regarded as a kind of continuous fluid composed of fluid materials. On the basis of meeting the continuity equation and momentum equation, Realizable k-e turbulence model and VOF model are applied. Rheological characteristics and bottom friction resistance of landslide mass is compiled with user-defined functions. The finite volume method was used to simulate the whole process of landslide surge movement in Lituya Bay, and the simulated results of the generated form of the waves and the velocity vector field were in good agreement with the test results. Based on this, a 3-D model was developed to simulate the movement of landslide generated impulse wave in a reservoir. Quantitatively time variations of the land-side generated impulse waves were obtained. The results show that the wave height decays slowly in a narrow straight river channel, and the wave shape is similar to solitary wave. However, the wave amplitude will be rapidly attenuated under the influence of the curved terrain in the reservoir. This simulation method can provide a basis for making the surge disaster emergency plan and evacuation plan. © 2023 China Water Power Press. All rights reserved.
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页码：268 / 278
页数：10
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