scholarly journals NUMERICAL SIMULATION STUDY ON DEPOSITION DOWNSTREAM ESTUARINE SLUICE

2012 ◽  
Vol 1 (33) ◽  
pp. 8 ◽  
Author(s):  
Xiping Dou ◽  
Xinzhou Zhang ◽  
Xiangming Wang ◽  
Jinhua Wang
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Physical Model ◽  
Feasibility Study ◽  
Simulation Study ◽  
Salt Intrusion ◽  
3D Numerical Model ◽  
2D Numerical Model

In order to resist tides and salt intrusion, there have been more than 300 tidal gates built at many river estuaries in China since 1960s. However, the serious deposition occurred at a lot of gates due to the changes of hydrodynamic and sediment conditions and lack of discharge from the rivers. At present, the research is mainly to analyze the reasons for siltation downstream gates and the measures of dredging. It is not enough for study on distribution simulation of deposition downstream sluice. Studies have shown that 2D numerical model cannot reflect the distribution of sediment siltation downstream gates. Therefore, it needs to develop 3D sediment numerical model for deposition prediction. In this paper, combined the feasibility study of a tidal gate at Mulanxi River, a physical model and 3D numerical model of sediment siltation downstream gate are conducted.

Discussion of “Numerical assessment of equivalent diameter equations for prefabricated vertical drains”

2013 ◽  
Vol 50 (7) ◽  
pp. 801-804
Author(s):  
Hui Wu ◽  
Liming Hu
Keyword(s):  
Numerical Model ◽  
Three Dimensional ◽  
Equivalent Diameter ◽  
Prefabricated Vertical Drains ◽  
Vertical Drains ◽  
Numerical Assessment ◽  
Equivalent Equation ◽  
3D Numerical Model ◽  
The Difference ◽  
2D Numerical Model

The Discussion revises the figure that compares different equivalent-diameter equations for prefabricated vertical drains, and the result of another equivalent equation that has been widely used in practice is also added into the figure. In addition, a three-dimensional (3D) numerical model is developed to compare with the two-dimensional (2D) numerical model used in the paper. The result indicates that the difference between the 3D and 2D models can be about 5%.

Investigation on the Regulation Techniques for TongGuTan Shoal of Yangtze River

2012 ◽  
Vol 170-173 ◽  
pp. 2066-2070
Author(s):  
Zhi Zhou Zhao ◽  
Hua Jun Zhou
Keyword(s):  
Numerical Model ◽  
Physical Model ◽  
Yangtze River ◽  
Concrete Block ◽  
Straight Channel ◽  
Flood Season ◽  
Physical Model Tests ◽  
Permanent Improvement ◽  
2D Numerical Model ◽  
Navigation Condition

TongGuTan shoal is typical pebble shoals of branching reach with bend in upper course of Yangtze river. Based on 2D numerical model and physical model tests, the features of flow and sediment movement, obstructing-navigation mechanism be studied. In order to achieve permanent improvement of navigation condition, it is suggested to excavate straight channel for navigation. The new structure such as bags-filled-stones dam body, irregular concrete block have achieved the good effects. It provides a good example of dredging construction in flood season to the similar shoal.

Numerical Study on Navigation Regulation Engineering in the Lower Reaches of Yangtze River

2012 ◽  
Vol 209-211 ◽  
pp. 751-754
Author(s):  
Ming Jin Zhang ◽  
Hua Qing Zhang ◽  
Yan Hua Yang
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Yangtze River ◽  
Numerical Study ◽  
Main Stream ◽  
The Yangtze River ◽  
Channel Regulation ◽  
Simulation Results ◽  
2D Numerical Model ◽  
Navigation Condition

The waterway of Jiangxinzhou to Wujiang section is the only hindering navigation section in Wuhu to Nanjing of the lower reaches of the Yangtze River. Because of the unsteadiness of the main stream, the navigation condition in this section tends to worse, in which the regulation work is sorely needed and more important. The major problem for channel regulation in this section is the design of regulation project. In this paper, the 2D numerical model for simulating the flow and sediment in the waterway of Jiangxinzhou-Wujiang section is used to analyze these questions. From the numerical simulation results, we know that the overall navigation regulation project can solve the problem of hindering navigation.

scholarly journals Numerical simulation of shell under local loading

2019 ◽  
pp. 91-96
Author(s):  
Aleksander Taubin ◽  
Konstantin Rumyantsev
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Numerical Experiment ◽  
Physical Model ◽  
Model Tests ◽  
Local Loading ◽  
Stress Strain ◽  
Physical Model Tests

This paper describes numerical model of the shell used in the simulation and determines its stress-strain parameters during the numerical experiment. The results of this simulation show a good correlation with the results of physical model tests.

NUMERICAL SIMULATION STUDY ON BIONIC MUCUS DRAG REDUCTION OF UNDERWATER VEHICLE

2020 ◽  
Vol 47 (4) ◽  
pp. 371-385
Author(s):  
Kaisheng Zhang ◽  
Chaofan Ma ◽  
Baocheng Zhang ◽  
Bo Zhao ◽  
Qiang Wang
Keyword(s):  
Numerical Simulation ◽  
Drag Reduction ◽  
Simulation Study ◽  
Underwater Vehicle
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