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Showing 1 to 20 of 135 for “"Porous medium"”.
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Heat pipe effect in porous medium
… and hydrologic characteristics of the fractured porous tuffs at Yucca Mountain, Nevada was conducted. The effects of different fracture and matrix properties including permeability, thermal conductivity, specific heat, porosity, and tortuosity on heat pipe performance in the vicinity of the waste …
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A Series Solution to the Porous Medium Equation
The Porous Medium Equation is a generalization of the Boussinesqequation, when the diffusivity is a power-law function of thehydraulic head, not only a linear function as in the case of theBoussinesq equation. We consider the case of a one-dimensionalaquifer, initially dry, and of semi-infinite …
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Dispersive mixing in a partially saturated porous medium.
Massachusetts Institute of Technology. Dept. of Civil Engineering. Thesis. 1974. Ph.D.
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Water Content - Pressure Head Relationships of a Porous Medium
Made available in DSpace on 2014-12-10T17:12:33Z (GMT). No. of bitstreams: 1 6801852.pdf: 3332491 bytes, checksum: 524a34dd74b57294b3296d1f1d3439ec (MD5) Previous issue date: 1967
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The nature of "trapped oil" in a porous medium
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1958
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Simulation and Modeling of Underground Coal Gasification Using Porous Medium Approach
Increasing global demand for energy and declining fossil fuel resources continue to make coal deposits a primary source of energy. However, the process of converting coal into valuable syngas through surface gasification requires conventional mining, extraction, transportation, storage, surface …
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Experimental study of drying of a porous medium at sub-residual saturations
… cases were started initially with heating up the porous medium with no flow, and then letting nitrogen gas flow through the test-section after a steady-state temperature distribution had been reached (denoted in what follows as the "steady heating case"); Temperatures throughout the bed and …
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Fully coupled CEM/CFD modelling of microwave heating in a porous medium
… results for the microwave heating of a porous material are presented in this paper. Coupled finite difference time domain and finite volume methods are used to solve equations that describe the electromagnetic field and heat and mass transfer in porous media. These equations are …
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Diffusion in an absorbing porous medium : from microscopic geometry to macroscopic transport
Two physical models of diffusion in absorbing porous media are proposed on two length scales. One models diffusion in the pore space of a random medium with absorbing interfaces while the other is a reaction diffusion model where particles are absorbed in the bulk. Typical particle traveling …
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Measurement of water saturation during two phase flow through a porous medium by electrical methods
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1958
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An Experimental Study of CO2 Dissolution into a Heavy Oil Without or With a Porous Medium
… heavy oil without or with an unconsolidated porous medium at different initial pressures and a constant temperature were measured and compared. In addition, the temperature dependence of the CO2 diffusivity in the Colony heavy oil was noted. Three different theoretical diffusion models for …
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Random close packing (RCP) of equal spheres: structure and implications for use as a model porous medium
… sphere-centres. In terms of using RCP as a model porous medium, an individual simplicial cell is equivalent to an individual pore. A number of measured pore-size distribution parameters are presented for the Finney packing, from which it is shown from first principles that drainage-imbibition …
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Influence of grain size of a porous medium on the movement of diesel fuel due to water table fluctuations
… to determine the influence of grain size of a porous medium and residual water saturation on the movement of diesel fuel. Three different grades of sand (#12, #20, and #30 grades with mean grain diameters of 0.178cm, 0.08cm, and 0.056cm respectively) were used in the experiments. A water table …
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Experimental investigation of the effects of upstream perturbations in the near-wall and core of a high porosity random-wire porous medium.
Experiments were conducted on a high-porosity porous medium to investigate the influences of upstream perturbations. The porous medium was fabricated by stacking stainless steel wire-mesh screens in a container of circular cross-section. A step change in porosity is considered a perturbation to the …
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Unsteady hydromagnetic chemically reacting mixed convection MHD flow over a permeable stretching sheet embedded in a porous medium with thermal radiation and heat source/sink
… over a permeable stretching sheet embedded in a porous medium with thermal radiation and heat source/sink is investigated numerically. The original partial di erential equations are converted into ordinary di erential equations by using similarity transformation. The governing non-linear partial …
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Discrete particle transport in porous media : discrete observations of physical mechanisms influencing particle behavior
… in the micron to submicron range behave in porous media is important to a number of environmental problems. Discrete particle behavior in the interior of a porous medium is complex and influenced by various physical and chemical factors. This work aimed to provide new insight into the …
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Laminar and turbulent dispersion of miscible fluids in porous media
… in the flow of miscible fluids through porous media was studied in this investigation. The relationship between the longitudinal dispersion coefficient and the average pore velocity was found experimentally for the three regimes of fluid flow in a porous medium. An equation was developed …
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Shear Dispersion in Double-Porosity Systems
… boundary condition at the interface between a porous medium and a conduit. Theoretical determination of shear dispersions presented in this thesis can be categorized as shear dispersions in: i) a fracture with porous walls, ii) a capillary tube with a porous wall, iii) a rough-walled fracture, …
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