Reinjection model studies in fractured and homogeneous geothermal systems.

Hoşca, Hüseyin


Discontinuous rock slope stability analysis by limit equilibrium approaches - a review
Azarafza, Mohammad; Akgün, Haluk; Ghazifard, Akbar; Asghari-Kaljahi, Ebrahim; Rahnamarad, Jafar; Derakhshani, Reza (2021-10-01)
Slope stability is one of the most important topics of engineering geology with a background of more than 300 years. So far, various stability assessment techniques have been developed which include a range of simple evaluations, planar failure, limit state criteria, limit equilibrium analysis, numerical methods, hybrid and high-order approaches which are implemented in two-dimensional (2D) and three-dimensional (3D) space. In the meantime, limit equilibrium methods due to their simplicity, short analysis t...
Streamwise oscillations of a cylinder beneath a free surface: Free surface effects on vortex formation modes
Bozkaya, Canan; Mironova, L. A.; Gubanov, O. I. (Elsevier BV, 2011-06-15)
A computational study of a viscous incompressible two-fluid model with an oscillating cylinder is investigated at a Reynolds number of 200 and at a dimensionless displacement amplitude of A = 0.13 and for the dimensionless forcing cylinder oscillation frequency-to-natural vortex shedding frequency ratios, f/f(0) = 1.5, 2.5, 3.5. Specifically, two-dimensional flow past a circular cylinder subject to forced in-line oscillations beneath a free surface is considered. The method is based on a finite volume discr...
Backcalculation of pavement layer properties using artificial neural network based gravitational search algorithm /
Öcal, Arda; Pekcan, Onur; Department of Civil Engineering (2014)
Transportation agencies need to make accurate decisions about maintenance strategies to provide sustainability of pavements. Non-destructive pavement evaluation means play a crucial role when making such assessments. A commonly used method is to use Falling Weight Deflectometer (FWD) device which measures the surface deflections under imposed loadings. Determination of layer properties through the use of FWD deflections is known as pavement layer backcalculation. This process requires the use of mathematica...
Back Analyses of Landfill Slope Failures
Huvaj Sarıhan, Nejan (null; 2008-08-16)
This paper investigates the shear strength of municipal solid waste (MSW) using back analyses of failed waste slopes. Shear strength of MSW is a function of many factors such as waste type, composition, compaction, daily cover, moisture conditions, age, decomposition, overburden pressure, etc. These factors together with non-standardized sampling methods, insufficient sample size to be representative of in-situ conditions, and limited shear displacement or axial strain imposed during the shear tests affect ...
Multiscale pore structure characterization and pore network modeling of middle east carbonates
Gündoğar, Satı Aslı; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2017)
The complex interplay between structural and wettability heterogeneities is responsible for the limited pore network modeling studies on carbonates. In this study, our purpose is to develop structurally representative pore networks of Middle East carbonates and to predict their macroscopic difficult-to-measure relative permeability and capillary pressure hysteresis curves and residual oil trends under mixed-wettability conditions. In comparison with the conventional pore-scale models, particular emphasis is...
Citation Formats
H. Hoşca, “Reinjection model studies in fractured and homogeneous geothermal systems.,” Middle East Technical University, 1986.