Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 65 for “"poroelastic"”.
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Poroelastic Center of Dilation Revisited
In both elasticity and poroelasticity, the nucleus of strain is usually used to refer to a singular solution such as the point force, the force dipole, the centers of rotation and dilation, etc. These fundamentals solutions constitute the building blocks for various problems of practical importance …
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Acoustic Propagation in Poroelastic Media
The propagation of acoustic waves in porous media is of interest in a variety of areas, including oil well logging, the seepage of contaminants into ground water supplies, and the flow of fluids in packed beds. The aim of this work is to solve the equations of motion for the fluid and solid domains …
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POROELASTIC AND SEISMIC CHARACTERIZATION OF HETEROGENEOUS RESERVOIR ROCKS
… focus of this dissertation is to link the poroelastic model that couples rock’s elastic and hydraulic properties to seismic characterization of the heterogeneous reservoirs. I have presented how to incorporate the dynamic poroelastic responses of microscopic and mesoscopic flow into the …
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Micro-Pipette Aspiration for Hyperelastic and Poroelastic Material
… with the properties of hyperelasticity and poroelasticity, to study the response of these materials under the loading conditions of aspiration. The work put forth, builds on complexities by considering geometric non-linearities of contact between the continuum and the pipette, leading to …
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STRESS AND FREQUENCY DEPENDENT PROPERTIES OF POROELASTIC ANISOTROPIC ROCK
The poroelastic response of fluid saturated porous rock due to stress variations is of interest in geophysics and geomechanics as it has practical applications in reservoir depletion, fluid injection, time-lapse monitoring, and carbon dioxide sequestration. The effective stress in a poroelastic …
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Prototype Testing of a Modified Poroelastic Matric Suction Sensor.
… of soils. This thesis documents development of a Poroelastic Matric Suction Sensor (PE sensor). The advantage of this sensor is that it is a direct method with a relatively large range of suction measurement (up to 8MPa), without any cavitation. Modifications of the sensor were carried out to …
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A mathematical model of an electromechanically coupled poroelastic medium
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1987.
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Poroelastic properties of carbonates: a case study on Indiana limestones
This thesis studies the poroelasticity of carbonate rocks and investigates the dependence of various physical properties on confining pressure and pore pressure. These physical properties include porosity, permeability, static strain, ultrasonic P- and S-wave velocities. In a process, I estimate …
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Geomechanical aspects of fracture growth in a poroelastic, chemically reactive environment
… and pattern development of multiple NHF in a poroelastic media. A realistic geomechanical model is developed to combine both the fluid flow and mechanical interactions between multiple fractures. The natural hydraulic fracture propagation is observed to consist of a series of crack-seal …
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Deciphering Hydrological Responses: Elastic and Poroelastic Behavior Through GPS Temporal Analysis
… are some regions which can exhibit a porous or poroelastic response to surface water loading. In these areas, the subsurface can expand with the introduction of water; either by the filling of pore spaces or inflation of subsurface reservoirs. This process has the opposite sign of elastic …
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Electromechanics of normal and degenerated cartilage : poroelastic behavior and electrokinetic mechanisms
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1987.
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Poroelastic Effect on Gas Transport and Storage in Organic Rich Shale Reservoir
This study sheds the light on the effect of poroelastic properties of the shale matrix on storage and transportation mechanism in multi-scale organic rich shale gas reservoirs. Over last decades shale gas research widen significantly, however, the behavior and properties of shale formation still …
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Earthquakes, groundwater and surface deformation : exploring the poroelastic response to megathrust earthquakes
This thesis explores the poroelastic effects of large subduction zone earthquakes using numerical models and a variety of datasets with the overarching goal of beginning to deconvolve post-seismic geodetic deformation signals -- while exploring other interesting phenomena involving the poroelastic …
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Application of the Variational Fracture Model to Hydraulic Fracturing in Poroelastic Media
… used models are designed without considering poroelastic effects even though a propagating hydraulic fracture induces deformation of the surrounding porous media. A rigorous hydraulic fracturing model capable of reproducing realistic fracture behaviors should couple rock deformation, fracture …
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Dynamic Poroelastic Finite Element Deformation Modelling of the Bárðarbunga Volcano, Iceland, 2015-2024
… movements at depth. Here, we present a dynamic poroelastic-reservoir Finite Element (FE) volcano deformation model. This thesis aims to reproduce the observed post-eruptive (2015 – 2024) deformation of the Bárðarbunga volcano to constrain the likely magma supply and storage characteristics. …
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Homogenization of a Cracked Poroelastic Medium - Numerical calculation of the coefficients and damage
… particular problem of this project is a cracked poroelastic medium, that is a Biot-type problem both in the grains and in the cracks. In order to solve the expanded problem resulting from the double scale asymptotic expansions a nite element code is used. Numerical simulations allow one to obtain …
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Polyacrylamide hydrogel friction controlled by time-dependent surface energy due to poroelastic relaxation
This thesis explores the control of friction by varying contact area, contact time, and sliding speed of polyacrylamide hydrogel. With a comprehensive understanding of the phenomenon, hydrogels could be designed with targeted friction behavior, and be used to design surfaces for tissue engineering …
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Development and Verification of Poroelastic Barrier Model With Active Transport: Application in Human Epidermis
Fundamental understanding of the mass transfer through the epidermis provides valuable information for different applications such as drug delivery, functioning artificial skin and thermal comfort. We propose a more detailed, physiologically motivated, model in which the outmost layer of the skin …
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Poroelastic Calibration for Hydromechanically Coupled Numerical Discontinuum Models with Application in Low Permeability Hard Rock
… understanding of the ground’s response the poroelastic response of the rock and flow through the intact rock can be incorporated into numerical models. This thesis provides a process to calibrate grain based poroelastic discontinuum numerical models which simulate the elastic response and …
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Poroelastic Finite Element Analysis of a Heterogeneous Articular Cartilage Explant Under Dynamic Compression in ABAQUS
<p> <p>A poroelastic finite element model of a heterogeneous articular cartilage disc was</p> <p>created to examine the tissue response to low amplitude (± 2% strain), low</p> <p>frequency (0.1 Hz) dynamic unconfined compression (UCC). A strong correlation</p> <p>has been made between the relative …
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