Results 41 to 50 of about 167,670,099 (290)

Seismic wave modeling of fluid-saturated fractured porous rock: including fluid pressure diffusion effects of discretely distributed large-scale fractures [PDF]

Solid Earth
The scattered seismic waves of fractured porous rock are strongly affected by the wave-induced fluid pressure diffusion effects between the compliant fractures and the stiffer embedding background. To include these poroelastic effects in seismic modeling,
Y. Qi, Y. Qi, X. Chen, X. Chen, Q. Zhao, Q. Zhao, X. Luo, C. Feng   +7 more
doaj   +1 more source

Self-organized criticality in fracture models at different scales

Examples and Counterexamples, 2022
Although modeling of fractures in solid materials has been within the focus of researchers for decades, a generally applicable and reliable numerical description is still an open topic.
Yousef Heider, Franz Bamer, Firaz Ebrahem, Bernd Markert   +3 more
doaj   +1 more source

Fracture Failure of Reinforced Concrete Slabs Subjected to Blast Loading Using the Combined Finite-Discrete Element Method

Latin American Journal of Solids and Structures
Numerical modeling of fracture failure is challenging due to various issues in the constitutive law and the transition of continuum to discrete bodies.
Z. M. Jaini, Y. T. Feng, D. R. J. Owen, S. N. Mokhatar   +3 more
doaj   +1 more source

Analysis of crack propagation in a “pull-out” test

Studia Geotechnica et Mechanica, 2019
The article describes a computer analysis of the pull-out test used to calculate the force needed to pull out a rock fragment and determine the shape of this broken fragment. The analyzed material is sandstone and porphyry.
Gontarz Jakub, Podgórski Jerzy
doaj   +1 more source

Numerical modeling of structural fracture processes for granular composites with isotropic elements of structure

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
Presents the results of numerical modeling of deformation processes, and processes of micro- and macrodestruction for granular composites. Detail discussed failure mechanisms at the structural level. Detected the effect of self-sustaining fracture.
A. V. Il'inykh
doaj   +3 more sources

Comparative analysis of numerical modeling of methods for intensifying inflow to the well, including hydrochloric acid treatment

Известия Томского политехнического университета: Инжиниринг георесурсов
Relevance. The need to enhance oil recovery from horizontal wells under complex geological and technical conditions. The use of more accurate numerical models, including chemical reactions and the modeling of complex fracture systems, allows ...
Denis A. Bychkov, Pavel N. Zyatikov
doaj   +1 more source

Direct numerical simulation of matrix diffusion across fracture/matrix interface

Water Science and Engineering, 2013
Accurate descriptions of matrix diffusion across the fracture/matrix interface are critical to assessing contaminant migration in fractured media. The classical transfer probability method is only applicable for relatively large diffusion coefficients ...
Yong Zhang, Eric M. Labolle, Donald M. Reeves, Charles Russell   +3 more
doaj   +1 more source

Coupled Hydraulic Fracture and Proppant Transport Simulation

Energies, 2020
This paper focuses on the study of proppant transport mechanisms in fractures during frac-packing operation. A multi-module, numerical proppant, reservoir and geomechanics simulator has been developed, which improves the current numerical modeling ...
Morteza Roostaei, Alireza Nouri, Vahidoddin Fattahpour, Dave Chan   +3 more
doaj   +1 more source

Effectiveness of Resistance Intradialytic Exercise Compared to Aerobic Intradialytic Exercise for Patients With Chronic Kidney Disease: A Randomized Controlled Clinical Trial

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Patients with chronic kidney disease undergoing hemodialysis commonly experience reduced physical function, fatigue, poor sleep quality, and impaired health‐related quality of life. Intradialytic exercise has been proposed as a non‐pharmacological strategy to improve these outcomes.
Klebson da Silva Almeida, Gisela Cristiane Miyamoto, Daniel da Costa Torres, Ian Setubal Reis Chaves, Jonas do Carmo Paschoalin, Braúlio Lima Nascimento, Luciana Dias Chiavegato   +6 more
wiley   +1 more source

Ofatumumab in Myelin Oligodendrocyte Glycoprotein Antibody–Associated Disease: A Comparison With Rituximab

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To evaluate the efficacy and safety of ofatumumab in patients with myelin oligodendrocyte glycoprotein antibody–associated disease (MOGAD), and compare it with rituximab. Methods We conducted a single–center, observational study including 22 MOGAD patients treated with ofatumumab and 21 treated with rituximab.
Yuxin Fan, Lei Zhou, Jingzi ZhangBao, Hongmei Tan, Zhouzhou Wang, Chao Quan   +5 more
wiley   +1 more source