The instability of water-sediment flow in fractures can easily induce disasters. Therefore, it is great significance for the prevention and control inrush to study two-phase fractures. Based on theory, a model system was established. Ansys Fluent software used characteristics smooth rough spatial-temporal evolution laws were studied; results indicated that they did not change with time fracture...

In a low permeability formation, connectivity of natural and induced fractures determines overall hydraulic diffusivity in fluid flow through this formation defines effective rock permeability. Efficient evaluation fracture is nontrivial task. Here, we utilize topological concept global efficiency to evaluate connectivity. We address the impact key geometrical properties stochastic networks (fr...

 Abstract Background: Osteoporosis is a major public health threat, and hip fracture is a serious consequence of osteoporosis. Apatient with an osteoporosis-related hip fracture has an increased risk for a second hip fracture. The effect of osteoporosis management on the risk of recurrent hip fracture was evaluated in this study. Methods: 58 hip fracture patients older than 50yr and BMD < 2.5 w...

Intermittent fluid pulses in the Earth’s crust can explain a variety of geological phenomena, for instance the occurrence of hydraulic breccia. Fluid transport in the crust is usually modeled as continuous Darcian flow, ignoring that sufficient fluid overpressure can cause hydraulic fractures as fluid pathways with very dynamic behavior. Resulting hydraulic fracture networks are largely self-or...

introduction: the main purpose of this study was to evaluate the prevalence of ophthalmic injuries associated with mid-facial fractures in patients admitted to shahid beheshti university hospital in babol, iran, from 2002 to 2012. materials and methods: a cross-sectional, retrospective study was undertaken to determine the prevalence of ophthalmic injuries associated with mid-facial fractures i...

fractured reservoirs contain about 85 and 90 percent of oil and gas resources respectively in iran. acomprehensive study and investigation of fractures as the main factor affecting fluid flow or perhapsbarrier seems necessary for reservoir development studies. high degrees of heterogeneity andsparseness of data have incapacitated conventional deterministic methods in fracture networkmodeling. r...

Structural and topological information play a key role in modeling of flow through fractured rock. Discrete fracture network (DFN) computational suites such as dfnWorks [23] are designed to simulate flow and transport in such media. Transport calculations that use a particle tracking method reveal that a small backbone of fractures exists where most transport occurs providing a significant redu...

Hydraulic fracturing is a technique that can provide space for oil and gas flow by pumping fluid into reservoir to fracture rock filling proppant create fractures or nets [...]

Scaling up highly heterogeneous aperture distributions of fractures into equivalent permeability tensors enables a substantial reduction in the computational cost simulating fluid flow fractured porous media by allowing employment coarser grids while keeping accuracy an explicit model. This work proposes adaptation and application conditional generative adversarial networks (CGAN) for upscaling...

Fracture transmissivity and detailed aperture fields are measured in analog fractures specifically designed to evaluate the utility of the Reynolds equation. We employ a light transmission technique with well-defined accuracy (;1% error) to measure aperture fields at high spatial resolution (;0.015 cm). A Hele-Shaw cell is used to confirm our approach by demonstrating agreement between experime...