Visualization and simulation of density driven convection in porous media using magnetic resonance imaging
| Autor: | James A. Montague, George F. Pinder, Scott Hipko, Jay V. Gonyea, Richard Watts |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Convection
Silicon dioxide 020209 energy Analytical chemistry Contrast Media 02 engineering and technology 01 natural sciences Permeability 010305 fluids & plasmas chemistry.chemical_compound 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Fluid dynamics medicine Water Movements Environmental Chemistry Density contrast Porosity Water Science and Technology medicine.diagnostic_test Chemistry Water Magnetic resonance imaging Mechanics Models Theoretical Silicon Dioxide Magnetic Resonance Imaging Solutions Permeability (electromagnetism) Porous medium |
| Zdroj: | Journal of contaminant hydrology. 212 |
| ISSN: | 1873-6009 |
| Popis: | Magnetic resonance imaging is used to observe solute transport in a 40cm long, 26cm diameter sand column that contained a central core of low permeability silica surrounded by higher permeability well-sorted sand. Low concentrations (2.9g/L) of Magnevist, a gadolinium based contrast agent, produce density driven convection within the column when it starts in an unstable state. The unstable state, for this experiment, exists when higher density contrast agent is present above the lower density water. We implement a numerical model in OpenFOAM to reproduce the observed fluid flow and transport from a density difference of 0.3%. The experimental results demonstrate the usefulness of magnetic resonance imaging in observing three-dimensional gravity-driven convective-dispersive transport behaviors in medium scale experiments. |
| Databáze: | OpenAIRE |
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