Shear-Induced Flow Channels in a Single Rock Fracture and Their Effect on Solute Transport

2010 ◽  
Vol 87 (2) ◽  
pp. 503-523 ◽  
Author(s):  
Victor Vilarrasa ◽  
Tomofumi Koyama ◽  
Ivars Neretnieks ◽  
Lanru Jing
Keyword(s):  
Solute Transport ◽  
Rock Fracture ◽  
Flow Channels ◽  
Induced Flow ◽  
Single Rock Fracture

Numerical Simulation of Solute Transport Instantaneously Injected in a Single Rock Fracture System: Inclusion of a Nonlinear Sorption Term

1994 ◽  
Vol 353 ◽  
Author(s):  
Yoko Fujikawa ◽  
M. Fukui
Keyword(s):  
Numerical Simulation ◽  
Solute Transport ◽  
Nonlinear Term ◽  
Transport Model ◽  
Rock Fracture ◽  
Porous Matrix ◽  
Nonlinear Sorption ◽  
The Laplace Transform ◽  
Single Rock Fracture ◽  
System Inclusion

AbstractThe effect of nonlinear Freundlich sorption isotherm on the transport of sorptive solute in a system of fracture and porous matrix was investigated through numerical simulation. To solve a set of partial differential equations of solute transport with nonlinear term, use of the Laplace transform Galerkin (LTG) technique was investigated. It was shown that the LTG method could be applied successfully to solve quasi-linearized transport equation. Sensitivity analysis showed that nonlinear sorption in porous matrix with order less than 1 increased the skewness of the breakthrough curve. The fitting of experimental effluent data using a transport model with nonlinear isotherms was also conducted.

scholarly journals Numerical Modeling of Fluid Flow in Single Rock Fracture during Shear with Special Algorism for Contact Areas

2008 ◽  
Vol 124 (2) ◽  
pp. 129-136 ◽  
Author(s):  
Yujing JIANG ◽  
Tomofumi KOYAMA ◽  
Bo LI ◽  
Yusuke TASAKU ◽  
Ryousuke SAHO ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Fluid Flow ◽  
Rock Fracture ◽  
Contact Areas ◽  
Single Rock Fracture

scholarly journals SIZE EFFECT ON THE PERMEABILITY AND SHEAR INDUCED FLOW ANISOTROPY OF FRACTAL ROCK FRACTURES

Fractals ◽  
2018 ◽  
Vol 26 (02) ◽  
pp. 1840001 ◽  
Author(s):  
NA HUANG ◽  
YUJING JIANG ◽  
RICHENG LIU ◽  
YUXUAN XIA
Keyword(s):  
Fluid Flow ◽  
Stable State ◽  
Simulation Method ◽  
Shear Direction ◽  
Direction Parallel ◽  
Flow Channels ◽  
Fracture Size ◽  
Flow Through ◽  
Model Size ◽  
Induced Flow

The effect of model size on fluid flow through fractal rough fractures under shearing is investigated using a numerical simulation method. The shear behavior of rough fractures with self-affine properties was described using the analytical model, and the aperture fields with sizes varying from 25 to 200[Formula: see text]mm were extracted under shear displacements up to 20[Formula: see text]mm. Fluid flow through fractures in the directions both parallel and perpendicular to the shear directions was simulated by solving the Reynolds equation using a finite element code. The results show that fluid flow tends to converge into a few main flow channels as shear displacement increases, while the shapes of flow channels change significantly as the fracture size increases. As the model size increases, the permeability in the directions both parallel and perpendicular to the shear direction changes significantly first and then tends to move to a stable state. The size effects on the permeability in the direction parallel to the shear direction are more obvious than that in the direction perpendicular to the shear direction, due to the formation of contact ridges and connected channels perpendicular to the shear direction. The variances of the ratio between permeability in both directions become smaller as the model size increases and then this ratio tends to maintain constant after a certain size, with the value mainly ranging from 1.0 to 3.0.

Investigation of grouting diffusion in a single rock fracture considering the influences of obstructions

2021 ◽  
Author(s):  
Wenqi Ding ◽  
Dong Zhou ◽  
Xiaoqing Chen ◽  
Chao Duan ◽  
Qingzhao Zhang
Keyword(s):  
Diffusion Process ◽  
Rock Fracture ◽  
Temporal Distribution ◽  
The Finite Element Method ◽  
Single Plate ◽  
Plate Fracture ◽  
Test Platform ◽  
Grouting Reinforcement ◽  
Spatio Temporal ◽  
Single Rock Fracture

Grouting reinforcement was used to improve rock strength and avoid seepage in rock engineering. A self-developed visualised test platform was developed and the influences of different fracture openness on grouting diffusion modes were revealed; the Bingham rheological model was imported to simulate the grouting diffusion process in a single plate fracture, the spatio-temporal distribution of the velocity field under different obstructions was determined using the finite element method. The results indicate that: 1) The grout diffuses faster with the increase of fracture openness, while a stagnation effect of the grouting diffusion velocity behind the obstruction occurs. 2) Due to obstructions, the grouting diffusion process can be divided into four stages: circular diffusion, flat diffusion, vortex diffusion, and butterfly diffusion. 3) The grouting diffusion area is divided into a fully-reinforced zone and a semi-reinforced zone, and the area of the latter increases with the fracture openness, while being little affected by the size of any obstruction. 4) Furthermore, some new grouting diffusion laws were revealed considering the asymmetrical arrangement of obstructions. The results presented in this work will be helpful for describing and predicting the grouting process in fracture networks.

Quantitative evaluation of fracture geometry influence on nonlinear flow in a single rock fracture

2020 ◽  
Vol 589 ◽  
pp. 125162
Author(s):  
Guan Rong ◽  
Jie Tan ◽  
Hongbin Zhan ◽  
Renhui He ◽  
Ziyang Zhang
Keyword(s):  
Quantitative Evaluation ◽  
Rock Fracture ◽  
Nonlinear Flow ◽  
Fracture Geometry ◽  
Single Rock Fracture

Research Advance in Fluid Flow through a Single Rock Fracture

2012 ◽  
Vol 204-208 ◽  
pp. 628-634
Author(s):  
Bao Hua Guo ◽  
Cai Xia Tian
Keyword(s):  
Fluid Flow ◽  
Fractured Rock ◽  
Rock Fracture ◽  
Research Work ◽  
Engineering Practice ◽  
Flow Through ◽  
Research Advance ◽  
Single Rock Fracture ◽  
Fractured Rock Masses ◽  
Channeling Flow

Flow properties through a single rock fracture are the foundation of researching fluid flow in fractured rock masses. Many researchers at home and abroad are engaging in this subject for the urgent need of engineering practice. This article mainly introduces concepts of roughness, aperture, tortuosity, channeling flow, and influencing factors of stress, temperature, anisotropic, inlet head, scale effect, solution etc. Finally, some research work should be done in future are given.

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