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 26 for “"Saturated Porous Media"”.
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Interaction between turbulent flow and saturated porous media
… the interaction between turbulent flow and saturated porous media has been investigated using computational fluid dynamics (CFD) simulations, flow visualisation experiments and laser Doppler velocimetry (LDV) measurements.
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One dimensional shear motions in fluid saturated porous media
… spectra are presented for certain well known porous media.
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Modelling the transport of iron-based colloids in saturated porous media
… and in the early stages of migration through the porous matrix. The model is intended to be used as a tool in the development of an efficient injection technology for field-scale applications of nano- and microscale iron suspensions. Due to the complexity of phenomena governing the transport or …
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Dynamics of Saturated Porous Media: Wave Induced Response and Instability of Seabed
… geomechanics to biomechanics require response of saturated porous media subjected to dynamic loading. An engineering problem requiring the true behavior of saturated porous medium should consider the coupling of both fluid and solid phases yielding the simultaneous analysis of flow of pore fluid …
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Improved numerical methods for modeling flow and transport processes in partially saturated porous media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1989.
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Dynamic and Static CO2 Mass Transfer Processes in Bulk Heavy Oil and Heavy Oil Saturated Porous Media
… for measuring CO2 diffusion coefficient in porous media. A hollow sand pack model was improvised to simulate a well-bore area, when CO2 and oil are in contact. In this model, CO2 is in the inner space, and the heavy oil saturated sand is placed in the outer space of the model. Six …
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A study of air flow through saturated porous media and its applications to in-situ air sparging
… the mechanisms governing air propagation through saturated porous media is therefore critical to the design of an effective cleanup treatment. The objectives of this investigation were thus to identify and to quantify the parameters that affect the advancement of an air front through saturated …
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Recovery of crude oil from saturated porous media as a function of geochemistry and wetting-phase dynamics for multiple remediation flushing strategies
… (fragmentation and recovery) as a function of media composition (geochemical/mineralogical) and pH alterations due to calcium-carbonate fraction. The sequential flushing technique (alkaline→ surfactant) yielded the highest recovery, 32% after 5 pore volumes (PV) of flushing. The crude oil …
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Microplastics in Urban Environments: Distribution, Fate, and Transport
… (SWR) ponds, bioretention systems (BRS), and saturated porous media. Field studies analyzed MPs in freshwater sediments of SWR ponds across residential, educational, and mixed urban land-use types, identifying distinct contamination patterns. Vertical distribution analyses in bioretention …
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
… volatile organic compounds when injected into saturated porous media. The current study evaluated nZVI mobility and subsequent reactivity with in-situ contaminants in a variably saturated porous media. The nZVI particles, synthesized onsite at subzero temperatures, demonstrated complete …
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Gwadapt: An adaptive finite element algorithm for groundwater contaminant transport problems
… flow and contaminant transport in variably saturated porous media. This numerical method is applied to models of two nuclear waste repository sites; The computer program used in this study was modified for execution on the Cray Y-MP supercomputer. Optimization of the code was undertaken for …
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A study of the influence of physical parameters on the drying of porous media
… the mass transfer that occurs in the drying of saturated porous media due to bulk flow of gas. The analysis and equations are developed in a one-dimensional perspective, and focus on the convection and evaporation that results. Humidity readings are monitored at various locations and used in the …
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A 3-dimensional finite element method for groundwater flow and containment transport
… to solve for contaminant transport in variably saturated porous media using the Finite element method. The numerical code was written in FORTRAN 77. The GWGRID program was used for mesh generation. This numerical model was applied to two nuclear waste sites; Two test cases were run. The first …
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Two-Dimensional Finite Element Analysis of Porous Geomaterials at Multikilobar Stress Levels
… and developing mechanical properties for porous geomaterials subjected to the high pressures encountered in penetration and blast-type loadings. A finite element (FE) code was developed to verify laboratory test results or to predict unavailable laboratory test data for porous media loaded …
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Dynamics of residual non-aqueous phase liquids in porous media subject to freeze-thaw
… phase liquid (NAPL) contaminants in water-saturated porous media. This problem is of critical importance to the entrapment of such contaminants in cold temperate, polar and high altitude regions, and has not been examined in the literature to date. This research work is conducted in three …
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Development and Characterization of Controlled-Release Permanganate Gelfor Groundwater Remediation
… of a novel, cost-effective scheme to remediate large, dilute plumes of DNAPLs in groundwater through the in-situ, well-based emplacement of concentrated permanganate solution mixed with a gelling agent. The controlled-release permanganate gel (CRP-G) solution was developed so that it may …
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Computational Techniques for Efficient Solution of Discretized Biot's Theory for Fluid Flow in Deformable Porous Media
… physical phenomena. Coupling effects in fluid-saturated porous media comes from the interaction between the geomechanics field and the fluid flow. Stresses subjected on the porous material result volumetric strains and fluid diffusion in the pores. In turn, pore pressure change cause effective …
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Evolution of Fault Strength from Microscopic Asperity Scale to Macroscopic Fault Zone Scale
… Next, considering the role of friction in fluid-saturated gouge, a linear stability analysis shows that rate-strengthening friction favors broader shear zone widths that lower strain rate for a given total slip rate. However, geologic and laboratory observations suggest that finite shear zones …
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