Results 271 to 280 of about 111,470 (303)

Fracture roughness and physical implications

2008
A large number of studies of fracture surface topography have revealed that for a wide class of materials, and fracture conditions, the surfaces exhibit a self-affine character. Moreover, the roughness exponent which characterizes this self-affinity appears to be universal. In this paper, we analyse some physical consequences of this property.
openaire   +1 more source

Elastic Contact on Rough Fracture Surfaces

Europhysics Letters (EPL), 1993
There is now ample evidence that fracture surfaces are self-affine. The elastic contact on such surfaces is expected to give rise to a power law dependence of the normal force on the penetration depth, whose exponent α depends on the roughness index of the surface, ζ.
K. J Måløy, Xiao-Lun Wu, A Hansen, S Roux   +3 more
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High-velocity flow in a rough fracture

Journal of Fluid Mechanics, 1999
We simulate high-velocity flow in a self-affine channel with a constant perpendicular opening by solving numerically the Navier–Stokes equations, and analyse the resulting flow qualitatively and quantitatively. At low velocity, i.e. vanishing inertia, the effective permeability is dominated by the narrowest constrictions measured perpendicular ...
Skjetne, E., Hansen, A., Gudmundsson, J. S.   +2 more
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Roughness characterization of fractures surfaces

2006
This paper presents a comparative study of various methods of roughness quantification applied to rock fractures. The parameters which are discussed and used for comparing 7 types of rock and two failure mode are : arithmetic mean value, quadratic mean value (and standard deviation of peaks heights), JRC and estimations of the fractal dimension by the ...
Legrain, Hughes, Tshibangu, Katshidikaya
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Better Rough Than Scarce: Proximal Femur Fracture Segmentation With Rough Annotations

IEEE Transactions on Medical Imaging
Proximal femoral fracture segmentation in computed tomography (CT) is essential in the preoperative planning of orthopedic surgeons. Recently, numerous deep learning-based approaches have been proposed for segmenting various structures within CT scans. Nevertheless, distinguishing various attributes between fracture fragments and soft tissue regions in
Xu Lu, Zengzhen Cui, Yihua Sun, Hee Guan Khor, Ao Sun, Longfei Ma, Fang Chen 0007, Shan Gao, Yun Tian 0006, Fang Zhou, Yang Lv, Hongen Liao   +11 more
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Friction factor for rough fractures: Roughness and flow inertia effects

Physics of Fluids
The friction factor is one of the key parameters for evaluating fluid flow characteristics and pressure head loss in fractures, and accurate prediction is crucial for a deeper understanding of fracture flow processes. Traditional studies often consider roughness effects only in the inertial friction factor, overlooking its impact on the viscous ...
Qianjin Zhang, Mingyang Wang, Qing Ma, Weiqiang Xie, Ruipeng Qian, Yangyang Guo, Shuai Zhang   +6 more
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Effect of fracture roughness on solute transport

Geosciences Journal, 2001
The purposes of this study are to investigate how fracture roughness affects solute transport and is to find a better transport mechanism causing a long breakthrough tailing. To achieve the purposes, the lattice Boltzmann method was used for simulating the solute transport in rough fractures. Rougher fracture yields a large velocity gradient across the
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Visual lab tests: Proppant transportation in a 3D printed vertical hydraulic fracture with two-sided rough surfaces

Journal of Petroleum Science and Engineering, 2021
Shibo Kuang, Aibing Yu
exaly  

Estimation of rough fracture network permeability using fractal and topology theories

Gas Science and Engineering, 2023
Di Shi, Liping Li, Yintong Guo
exaly  

Study on proppant embedment in rough fracture surface based on three dimension laser scanning

Journal of Petroleum Science and Engineering, 2022
Cong Lu
exaly