Results 11 to 20 of about 1,427,983 (311)

Idealisations of Dynamic Modelling for Railway Ballast in Flood Conditions

Applied Sciences, 2019
As the main component of a ballasted railway system, railway ballast is frequently used by the railway industry to enhance constructability and practicality.
Sakdirat Kaewunruen, Tao Tang
doaj   +2 more sources

Numerical modeling of cavitation induced water hammer using finite volume method

IOP Conference Series: Materials Science and Engineering
Abstract A water hammer is a pressure surge caused by the sudden stoppage of a moving liquid, typically due to rapid valve closure or pump shutdown. This abrupt momentum change generates a powerful pressure wave that can damage pipes and reduce component efficiency.
R Kalla, A Garva, P Ghosh
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Fracture size inversion method based on water hammer signal for shale reservoir

Frontiers in Energy Research
Hydraulic fracturs size inversion plays an important role on evaluating hydraulic fracturing efficiency. Fracture size can be calculated by microseism events or all the pressure data generated by hydraulic fracturing stimulations. These methods are time-consuming.
Bo Zeng, Bo Zeng, Shengjie Wei, Yuliang Su, Junchuan Gui, Jiangrong Feng, Yintong Guo, Peihong Lyu   +7 more
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Numerical modeling and simulation of water hammer phenomena using the MacCormack method

Water Practice & Technology
ABSTRACT Water hammer refers to pressure fluctuations caused by changes in fluid speed in hydraulic systems. This research proposes a model using the MacCormack method to study and control water hammer, specifically focusing on managing valve closure to reduce shock wave pressure during transient flow.
Abdelouaheb Toumi, Fateh Sekiou, Fateh Afoufou   +2 more
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Flux Vector Splitting Method of Weakly Compressible Water Navier-Stokes Equation and Its Application

Water, 2023
Water is a weakly compressible fluid medium. Due to its low compressibility, it is usually assumed that water is an incompressible fluid. However, if there are high-pressure pulse waves in water, the compressibility of the water medium needs to be ...
Heng Li, Bingxiang Huang
semanticscholar   +1 more source

Spatially resolved texture analysis of Napoleonic War era copper bolts [PDF]

, 2017
The spatial resolution achievable by a time-of-flight neutron strain scanner has been harnessed using a new data analysis methodology (NyRTex) to determine, nondestructively, the spatial variation of crystallographic texture in objects of cultural ...
Arletti, Artioli, Artioli, Cartechini, Chen, Cho, Florencia Malamud, Hielscher, Imberti, James, Joe Kelleher, Jon James, Kockelmann, Kockelmann, Kockelmann, Kockelmann, Kropff, Langh, Malamud, Malamud, Matthies, Nneji, Park, Peter Northover, Santisteban, Santisteban, Shirley Northover, Siano, Siano, Stephen Nneji, Wang, Williams, Xie   +32 more
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A Simulation Calculation Method of a Water Hammer with Multpoint Collapsing [PDF]

Energies, 2020
The traditional discrete vapor cavity model (DVCM) is widely used in water hammer simulation. Water column separation in pipelines is usually predicted with this model. Nevertheless, the main weaknesses of this model consist of numerical instability and nonconvergence.
Zhao, Yang, Wang, Zhou, Li, Zhang
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Method of Distributions for Water Hammer Equations With Uncertain Parameters [PDF]

Water Resources Research, 2018
AbstractWater hammer equations (WHE) are routinely used to interpret leak detection tests in pipe networks. Assimilation of pressure data into model predictions is typically done within the probabilistic framework, which treats uncertain model parameters (e.g., initial and boundary conditions, location, and intensity of a leak) as random variables so ...
Abdulrahman Alawadhi, Francesca Boso, Daniel M. Tartakovsky   +2 more
openaire   +1 more source

The technology of Incremental Sheet Forming - a brief review of the history [PDF]

, 2010
This paper describes the history of Incremental Sheet Forming (ISF) focusing on technological developments. These developments are in general protected by patents, so the paper can also be regarded as an overview of ISF patents in addition to a ...
Boogaard, A.H. van den, Emmens, W.C., Sebastiani, G.   +2 more
core   +3 more sources

Digital Rubbing through Physical Simulation: A Non-Invasive Computational Approach for Epigraph Preservation [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The preservation of ancient Chinese inscription relics, including oracle bones, steles, and precious metal artifacts, faces critical challenges due to irreversible degradation from environmental erosion and physical contact during documentation.
H. Xiang, H. Xiang, F. Zhang, F. Zhang, F. Zhang, X. Wang, X. Wang, J. Liu, J. Liu, A. Tian, A. Tian, Y. Zhu, J. Gao, X. Huang, X. Huang, X. Huang   +15 more
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