scholarly journals Experimental Study on Flow Structure around Spur Dikes of Different Types

CONVERTER ◽  
2021 ◽  
pp. 778-788
Author(s):  
Tao Yu, Et al.
Keyword(s):  
Flow Structure ◽  
Cross Section ◽  
Water Surface ◽  
Circular Cross Section ◽  
Surface Profile ◽  
Spur Dike ◽  
Trapezoidal Cross Section ◽  
Variation Characteristics ◽  
Regulation Function ◽  
Water Surface Profile

As water damage phenomenon of spur dike exists generally, spur dike must be maintained in order to ensure its regulation function, but its structure changed in the process of maintenance.  In order to find out flow structure around the spur dike of different pattens, through generalized flume model tests, variation characteristics of water surface profile and flow velocity around the spur dike of five different pattens were analysed. The results show that the straight head had a greater influence than hook head spur dike on the water surface profile, circular cross-section had smaller effects than trapezoidal cross-section spur dike on the water surface profile; Velocity of Choke area and contraction order from large to small is trapezoidal cross-section and fan straight head dike, trapezoidal cross-section and arc straight head dike, arc section and arc straight head dam, trapezoidal cross-section and fan hook head dike, trapezoidal cross-section arc hook head dike; Cross section vertical velocity distribution from large to small is trapezoidal cross-section and fan hook head dam, trapezoidal cross-section and circular straight head dike, arc cross-section and circular straight head dam, trapezoidal cross-section and circular hook head dike.

The Normal Depth and Critical Depth of Special Cross-Section

2012 ◽  
Vol 594-597 ◽  
pp. 2003-2008
Author(s):  
Bing Qian Wei ◽  
Zheng E Wang ◽  
Wen Qiang Meng ◽  
Yang Liu
Keyword(s):  
Cross Section ◽  
Water Surface ◽  
Circular Cross Section ◽  
Surface Profile ◽  
Water Diversion ◽  
Critical Depth ◽  
Water Delivery ◽  
Circular Shape ◽  
Water Surface Profile ◽  
Mathematical Derivation

In water diversion project and water delivery project, horseshoe cross-section and circular cross-section are commonly used. The hydraulic elements of nonstandard horseshoe shape and circular shape are difficult to calculate because of their complex section. This article gives the formulas of hydraulic elements and iterative formulas of normal depths and critical depths of horseshoe shape section composed of 6 arcs and 2 kinds of irregular circular shape section by mathematical derivation. And on the basis of the relation with depth, normal depth and critical depth, we can estimate the type of water surface profile. It can be applied in calculation of water surface profile 81.68 km Qinling tunnel of south water to north project. The formulas of normal depth and critical depth and hydraulic elements can be used in other similar water delivery project.

Study on the Beach Protection with the Tetrahedron Like Penetrating Frame Groups

2011 ◽  
Vol 90-93 ◽  
pp. 2533-2536
Author(s):  
Tao Yu ◽  
Ping Yi Wang ◽  
Qian Ying Liu ◽  
Jing Tao Zheng
Keyword(s):  
Flow Structure ◽  
Model Experiment ◽  
Water Surface ◽  
Surface Profile ◽  
Generalized Model ◽  
Bank Protection ◽  
Water Surface Profile

The triangular taper penetrating frame is always used at the flood and bank protection. It is given that the tendency of longitudinal and lateral water surface profile and change of velocity near the triangular taper penetrating frame by the flume generalized model experiment and compared with the flow structure near the triangular taper penetrating frame with beach protection construction or not. It points out the triangular taper penetrating frame can protect the beach better.

scholarly journals FEM analysis of water surface profile using VOF Method

2021 ◽  
Vol 1116 (1) ◽  
pp. 012112
Author(s):  
Avdhesh Kumar Sharma ◽  
Prashant Kumar Dixit ◽  
Shashank Srivastava
Keyword(s):  
Water Surface ◽  
Surface Profile ◽  
Fem Analysis ◽  
Vof Method ◽  
Water Surface Profile

scholarly journals PENGARUH BENDUNG TERHADAP PROFIL MUKA AIR SUNGAI BATANG GADIS

2014 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Sudarmanto ,
Keyword(s):  
Numerical Integration ◽  
Cross Section ◽  
Water Surface ◽  
Surface Profile ◽  
Uniform Flow ◽  
Flood Discharge ◽  
Before And After ◽  
Numerical Integration Methods ◽  
The Village ◽  
River Cross Section

Placement of the weir in the river Batang Gadis will cause population anxiety in the village Pulungan which located upstream weir as far as 3 km, due to a weir can cause water surface profile of the river getting higher and ultimately to increase the pool of flooding in residential areas.Assuming modeling of river a uniform flow, river cross-section has a rectangular shape with width 50 m and 40 m, the roughness Manning 0.0025, the profile of water flow floods that occurred in 2 yaears, 25 years, and 100 years before and after the existing weir can be calculated by numerical integration methods.  From the calculation, the length of the water behind the weir is 1.4 km upstream towards the weir, which means that the depth of the water level rises to as far as 1.4 km and after that the depth of water before and after there the weir is same. Because the village Pulungan located 3 km to the upstream, the weir did not affect the increase in the flood waters in the village Pulungan. At 2 years flood discharge does not cause inundation in the village Pulungan, but the flood discharge 25 years and 100 years has led to inundation in the village Pulungan with the depth of each pool 0.971 m and 1.675 m. Keywords: uniform flow, numerical integration, inundation, flood discharge.

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