A look at dispersion in porous media through computed tomography imaging

Peters, Ekwere J.; Gharbi, Ridha; Afzal, Nadeem

doi:10.1016/0920-4105(95)00054-2

Cited by 20 publications

(9 citation statements)

References 4 publications

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“…to measure the transient changes of the solute concentration across the porous medium (Bacri et al 1987;Ding and Candela 1996;Peters et al 1996;Drazer et al 1999;Manz et al 1999). Visualization experiments of solute dispersion performed on transparent model porous media of varying morphology have been used to estimate the longitudinal and transverse dispersion coefficients as functions of Peclet number and identify the relevant solute dispersion regimes (Charlaix et al 1988;Detwiler et al 2000;Theodoropoulou et al 2003;Tsakiroglou et al 2005a).…”

Section: Introductionmentioning

confidence: 99%

The Longitudinal Dispersion Coefficient of Soils as Related to the Variability of Local Permeability

Aggelopoulos

Tsakiroglou

2007

Water Air Soil Pollut

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Solute (NaCl) miscible displacement experiments are performed on long disturbed soil columns to determine the hydrodynamic longitudinal dispersion coefficient and correlate it with the variability of the local permeability. The solute concentration, averaged over several cross-sections along the soil column, is monitored by measuring the electrical resistance between rod electrodes. The measured solute concentration breakthrough curves are fitted simultaneously with the one-region and two-region analytical models of the 1-D advection-dispersion equation to estimate the longitudinal dispersion coefficient, D L , as a function of Peclet number, Pe, for common groundwater flow velocities (2

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Section: Introductionmentioning

confidence: 99%

The Longitudinal Dispersion Coefficient of Soils as Related to the Variability of Local Permeability

Aggelopoulos

Tsakiroglou

2007

Water Air Soil Pollut

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“…It can be used to gain insight into a variety of physical phenomena associated with transport in porous media (Chaouki et al 1997;Peters et al 1996;Karacan 2003) and found special attention for the investigation of problems related to the production of reservoir fluids (Peters and Hardham 1990;Mogensen et al 2001;Schembre and Kovscek 1996).…”

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confidence: 99%

Experimental investigation of liquid chromatography columns by means of computed tomography

Astrath

Lottes

et al. 2007

Adsorption

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The efficiency of packed chromatographic columns was investigated experimentally by means of computed tomography (CT) techniques. The measurements were carried out by monitoring tracer fronts in situ inside the chromatographic columns. The experimental results were fitted using the equilibrium dispersive model (EDM) and varying the so called apparent axial dispersion coefficient. The additivity of the first and second central moments was exploited to estimate column efficiency in different regions of the column.The results showed that the columns under investigation offered a higher column efficiency in the centre compared to the wall region. Furthermore the void fraction in the vicinity of the walls was lower than that in the column core. For this reason the bands were conveyed faster in the central region of the column where the permeability was higher. This result is in good agreement with earlier findings.

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“…One-dimensional displacement of CH 4 by CO 2 into the coal sample was solved with an analytical method (Peters et al, 1996).…”

Section: Analytical Modelingmentioning

confidence: 99%

“…This displacement problem is solved with an analytical method that was proposed by Peters et al (1996). Tang et al (2005) In order to study the CO 2 sequestration in coal seams and enhanced coal bed methane recovery process, a one-dimensional binary displacement experiment was conducted by Tang et al (2005).…”

Section: Introductionmentioning

confidence: 99%

Modeling Binary CO₂/CH₄Flow through Coal Media

Gümrah

Balan

Atay

2008

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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CO 2 can be sequestered in coal seams considering the environmental issues. By means of injecting CO 2 into the coal seams, both sequestration of CO 2 and the enhanced recovery of methane inside the coal seam can be realized. Onedimensional simulation regarding the binary CO 2 /CH 4 flow in a coal seam core was studied by using an analytical solution method. The simulation results were compared with experimental data by matching the effluent concentrations of CO 2 and CH 4 . The transport parameters such as longitudinal dispersion coefficient, retardation factor, and distribution coefficient were determined. It was seen that the amount of CO 2 captured inside the coal sample during binary displacement was much lower than the maximum adsorption capacity of the coal at the same pressure. Then the transport behavior of CO 2 and CH 4 inside the coal seam was simulated. The results of analytical solution were in good agreement with the measured ones within the acceptable error range.

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A look at dispersion in porous media through computed tomography imaging

Cited by 20 publications

References 4 publications

The Longitudinal Dispersion Coefficient of Soils as Related to the Variability of Local Permeability

The Longitudinal Dispersion Coefficient of Soils as Related to the Variability of Local Permeability

Experimental investigation of liquid chromatography columns by means of computed tomography

Modeling Binary CO₂/CH₄Flow through Coal Media

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A look at dispersion in porous media through computed tomography imaging

Cited by 20 publications

References 4 publications

The Longitudinal Dispersion Coefficient of Soils as Related to the Variability of Local Permeability

The Longitudinal Dispersion Coefficient of Soils as Related to the Variability of Local Permeability

Experimental investigation of liquid chromatography columns by means of computed tomography

Modeling Binary CO2/CH4Flow through Coal Media

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Modeling Binary CO₂/CH₄Flow through Coal Media