Influence of Waterproof Wall in Approach Channel of Double-Line Ship Lock on Flow Condition

2014 ◽  
Vol 716-717 ◽  
pp. 347-350
Author(s):  
Jun Tao Li ◽  
Wei Peng
Keyword(s):  
Flow Velocity ◽  
Flow Condition ◽  
Second Line ◽  
Hydraulic Characteristics ◽  
Xiangjiang River ◽  
Double Line ◽  
Approach Channel ◽  
Lock In ◽  
Transverse Flow Velocity ◽  
Ship Lock

Unsteady flow during lock filling and emptying in approach channel of double-line ship lock is more complicated than that of single line ship lock. In this paper, by a 3-D numerical model, the water fluctuation inside approach channel under different arrangement types of waterproof wall and the hydraulic characteristics such as longitudinal flow velocity and transverse flow velocity were analyzed on the basis of the 2000t second-line ship lock construction project of Zhuzhou navigation power junction in Xiangjiang River. According to the separate arrangement scheme and the completely-connected arrangement scheme of approach channel, the flow condition problem may exist in the scheme was analyzed. In order to improve the ship navigation and berthing condition, it was proposed that the waterproof wall should be set between the approach channels of the second-line ship lock.

Navigable Flow Condition Numerical Simulation for Approach Channel of Tiangongtang Junction

2012 ◽  
Vol 490-495 ◽  
pp. 2444-2448
Author(s):  
Cen Wen ◽  
Guo Jin Ran
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Flow Velocity ◽  
Steady Flow ◽  
Flow Regime ◽  
Flow Condition ◽  
Flow Conditions ◽  
Approach Channel

The 2D steady flow mathematical model simulate the navigable flow condition for entrance and connection reach in the upstream and downstream approach channels of Tiangongtang junction corresponding to different quantity of flow, and discuss the flow condition for navigation at entrance area of approach channels. It obtains the flow velocity and flow regime by calculation, and put forward some measures for improving navigation flow conditions.

scholarly journals Study of Dependence of Kinetic Freezeout Temperature on the Production Cross-Section of Particles in Various Centrality Intervals in Au–Au and Pb–Pb Collisions at High Energies

Entropy ◽  
2021 ◽  
Vol 23 (4) ◽  
pp. 488
Author(s):  
Muhammad Waqas ◽  
Guang-Xiong Peng
Keyword(s):  
Transverse Momentum ◽  
Flow Velocity ◽  
Production Cross ◽  
Center Of Mass ◽  
Wave Model ◽  
Transverse Flow ◽  
Peripheral Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Transverse Flow Velocity

Transverse momentum spectra of π+, p, Λ, Ξ or Ξ¯+, Ω or Ω¯+ and deuteron (d) in different centrality intervals in nucleus–nucleus collisions at the center of mass energy are analyzed by the blast wave model with Boltzmann Gibbs statistics. We extracted the kinetic freezeout temperature, transverse flow velocity and kinetic freezeout volume from the transverse momentum spectra of the particles. It is observed that the non-strange and strange (multi-strange) particles freezeout separately due to different reaction cross-sections. While the freezeout volume and transverse flow velocity are mass dependent, they decrease with the resting mass of the particles. The present work reveals the scenario of a double kinetic freezeout in nucleus–nucleus collisions. Furthermore, the kinetic freezeout temperature and freezeout volume are larger in central collisions than peripheral collisions. However, the transverse flow velocity remains almost unchanged from central to peripheral collisions.

scholarly journals Analyzing Transverse Momentum Spectra of Pions, Kaons and Protons in p–p, p–A and A–A Collisions via the Blast-Wave Model with Fluctuations

Entropy ◽  
2021 ◽  
Vol 23 (7) ◽  
pp. 803
Author(s):  
Hai-Ling Lao ◽  
Fu-Hu Liu ◽  
Bo-Qiang Ma
Keyword(s):  
Transverse Momentum ◽  
Flow Velocity ◽  
Blast Wave ◽  
Proper Time ◽  
Wave Model ◽  
Transverse Flow ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Transverse Flow Velocity ◽  
Freeze Out

The transverse momentum spectra of different types of particles, π±, K±, p and p¯, produced at mid-(pseudo)rapidity in different centrality lead–lead (Pb–Pb) collisions at 2.76 TeV; proton–lead (p–Pb) collisions at 5.02 TeV; xenon–xenon (Xe–Xe) collisions at 5.44 TeV; and proton–proton (p–p) collisions at 0.9, 2.76, 5.02, 7 and 13 TeV, were analyzed by the blast-wave model with fluctuations. With the experimental data measured by the ALICE and CMS Collaborations at the Large Hadron Collider (LHC), the kinetic freeze-out temperature, transverse flow velocity and proper time were extracted from fitting the transverse momentum spectra. In nucleus–nucleus (A–A) and proton–nucleus (p–A) collisions, the three parameters decrease with the decrease of event centrality from central to peripheral, indicating higher degrees of excitation, quicker expansion velocities and longer evolution times for central collisions. In p–p collisions, the kinetic freeze-out temperature is nearly invariant with the increase of energy, though the transverse flow velocity and proper time increase slightly, in the considered energy range.

scholarly journals Imaging and quantifying transverse flow velocity with the Doppler bandwidth in a phase-resolved functional optical coherence tomography

2002 ◽  
Vol 27 (6) ◽  
pp. 409 ◽  
Author(s):  
Hongwu Ren ◽  
Kjell Morten Brecke ◽  
Zhihua Ding ◽  
Yonghua Zhao ◽  
J. Stuart Nelson ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Flow Velocity ◽  
Transverse Flow ◽  
Optical Coherence ◽  
Transverse Flow Velocity

scholarly journals Erratum

1941 ◽  
Vol 6 (4) ◽  
pp. 257-257
Keyword(s):  
Mathematical Society ◽  
Second Line ◽  
Double Line ◽  
Cubic Surfaces

It has been pointed out that, in the paper by H. W. Richmond (Proceedings of the Edinburgh Mathematical Society (2), 6 (1940), 190-191), lines 3 and 4 of page 191 should read as follows:—Now the pencil includes two ruled cubic surfaces, one of them having 8′ as its double line and 7′ for the second line which the generators meet.

The Research of Navigation Flow Conditions and Improvement Measures on Entrance Area and Connecting Reach of Dahua Lock in Hongshui River

2011 ◽  
Vol 250-253 ◽  
pp. 3624-3629
Author(s):  
Dian Guang Ma ◽  
Xin Liu ◽  
Jia Qiang Zhao ◽  
Xiao Fei Liu ◽  
Shao Xi Li
Keyword(s):  
Flow Conditions ◽  
Guangxi Province ◽  
Navigation Problem ◽  
Model Combining ◽  
Approach Channel ◽  
Improvement Measures ◽  
Navigation Lock ◽  
Lock In ◽  
Inflow Conditions ◽  
Pattern Problem

The ship facilities didn’t be constructed in step with the construction of Dahua Terminal in Hongshui River of Guangxi province, while the argumentation didn’t be carried out when navigation lock was built out. In the condition above, when the navigation lock was completed, the navigation flow conditions in the entrance area of downstream and the linkage section was bad, so ships were difficult to enter the approach channel. The research of navigation flow conditions and nay navigation mechanism in the entrance area of downstream and the linkage section in current condition was implemented through physical model combining ship model. The method of using traditional navigation wall and navigation pier to improve flow conditions didn’t be adopted in renovation research. The new renovation idea of changing inflow conditions was used innovatively and bad flow pattern problem was solved by using deep pools terrain in the entrance area of downstream. After the implementation of the engineering, nay navigation problem was solved effectively and ships could pass the terminal successfully. This engineering provides a new way to solve similar terminal navigation problem.

scholarly journals Study of Proton, Deuteron, and Triton at 54.4 GeV

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
M. Waqas ◽  
G. X. Peng
Keyword(s):  
Transverse Momentum ◽  
Flow Velocity ◽  
Star Collaboration ◽  
Wave Model ◽  
Transverse Flow ◽  
Peripheral Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Transverse Flow Velocity ◽  
Freeze Out

Transverse momentum spectra of proton, deuteron, and triton in gold-gold (Au-Au) collisions at 54.4 GeV are analyzed in different centrality bins by the blast wave model with Tsallis statistics. The model results are approximately in agreement with the experimental data measured by STAR Collaboration in special transverse momentum ranges. We extracted the kinetic freeze-out temperature, transverse flow velocity, and freeze-out volume from the transverse momentum spectra of the particles. It is observed that the kinetic freeze-out temperature is increasing from the central to peripheral collisions. However, the transverse flow velocity and freeze-out volume decrease from the central to peripheral collisions. The present work reveals the mass dependent kinetic freeze-out scenario and volume differential freeze-out scenario in collisions at STAR Collaboration. In addition, parameter q characterizes the degree of nonequilibrium of the produced system, and it increases from the central to peripheral collisions and increases with mass .

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