Modelling diffusion from simulated porous structures

Laudone, Giuliano M.; Matthews, G. Peter; Gane, Patrick

doi:10.1016/j.ces.2007.12.031

Cited by 31 publications

(26 citation statements)

References 24 publications

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“…PoreCor © can generate quasi-realistic models, and it has been used by various authors for modelling different materials such as soil, rock, membranes and paper (Johnson et al, 2003;Matthews et al, 1995aMatthews et al, ,b, 2006. It has also been used to simulate diffusion processes (Laudone et al, 2008) or absorption (Ridgway and Gane, 2002) through a porous structure. In this work, we use PoreCor © as a tool for comparison between the microstructure of Utrillas Sandstones before and after CO 2 supercritical (CO 2 sc) injection.…”

Section: Pore Network Modellingmentioning

confidence: 99%

“…Cubic pores are positioned with their centres at each node and connected by smaller cylindrical pores oriented in the three Cartesian directions (Laudone et al, 2008). The types of structures that PoreCor © can generate are: random representing a disordered structure, horizontally banded with pores ranging from fine to coarse vertically, pores varying towards the centre, vertically banded pores, or a radial structure with two variations, coarse to fine towards the centre or fine to coarse towards the centre (Laudone et al, 2008). The type of structure to be applied in the model and the variation of the correlation coefficient are the first decisions to make in the modelling process.…”

Section: Pore Network Modellingmentioning

confidence: 99%

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Experimental CO2 injection: Study of physical changes in sandstone porous media using Hg porosimetry and 3D pore network models

2015

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a b s t r a c tVariations in the pore system of sandstones from the so-called Utrillas Formation (Lower Cretaceous, Iberian Peninsula) after CO 2 injection have been investigated in a laboratory on a micro scale. In this study, we present results regarding variations in the pore spaces of sandstones caused by the injection of CO 2 and its permanence in supercritical conditions in contact with a rock sample for two months. The modifications produced in the porosity and pore size distribution have been evaluated on two geological samples, using a 3D modelling of the results obtained by Hg intrusion porosimetry. Reconstructions of the pore structure of the rock before and after CO 2 injection from mercury intrusion-extrusion curves, generating virtual models of pores that reproduce the experimental porosity. By analysing the results, a drastic modification in the mesoporosity of the rock is confirmed, which may have a paramount influence not only on the total storage capacity but also on the percolation of fluid through the rock.

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Section: Pore Network Modellingmentioning

confidence: 99%

Section: Pore Network Modellingmentioning

confidence: 99%

Experimental CO2 injection: Study of physical changes in sandstone porous media using Hg porosimetry and 3D pore network models

2015

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“…[22,24] and references therein. A related local structural characteristic is the so-called coordination number (also called connectivity).…”

Section: Coordination Numbermentioning

confidence: 99%

Local Structural Characteristics of Pore Space in GDLs of PEM Fuel Cells Based on Geometric 3D Graphs

Thiedmann

Hartnig

Manke

et al. 2009

J. Electrochem. Soc.

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Physical properties affecting transport processes inside the gas diffusion layer (GDL) in fuel cells mainly depend on the microscopic structure of its pore space. The presented characterization of the pore space is based on geometric 3D graphs, representing the complex microscopic structure. This description of the open volume contains the essential information on the geometrical structure of the pore space such as its connectivity. Additionally, the geometric structure of the graph, i.e., its vertices and edges, can be marked to display transport related properties such as pore diameters and pore necks. This 3D graph representation allows for an investigation of the local structural characteristics of the GDL by considering local tortuosity characteristics, pore sizes, and connectivity characteristics, respectively. The notion of a local shortest path length through the pore space of the GDL is introduced and the probability distribution of this random variable is computed. Its mean value is related to the (physical) tortuosity which is given by the * Corresponding author: w.lehnert@fz-juelich.de; Electrochemical society active member

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“…As for other porous solids, pellet microstructure is quite complex with pores of diverse shapes and sizes, which makes the study of drug transport through the network difficult (Armatas and Pomonis, 2004). Mercury intrusion porosimetry can inform about total porosity, pore size distribution, pore connectivity and tortuousness (Laudone et al, 2008;Gomez-Carracedo et al, 2009). This information is the basis for predicting the topology of porous structures using geometric models of various complexities, such as random-loose packing of spheres that are overlapped to achieve a given void fraction (Zalc et al, 2003(Zalc et al, , 2004 or twoand three-dimensional lattices of complex pore shapes (Kloubek, 1994) or cylindrical-or cubic-shaped pores (Wood and Gladden, 2002a,b).…”

Section: Introductionmentioning

confidence: 99%

Modelling of porosity and waterfronts in cellulosic pellets for understanding drug release behavior

Carracedo¹,

Martínez‐Pacheco²,

Concheiro³

et al. 2010

International Journal of Pharmaceutics

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Modelling diffusion from simulated porous structures

Cited by 31 publications

References 24 publications

Experimental CO2 injection: Study of physical changes in sandstone porous media using Hg porosimetry and 3D pore network models

Experimental CO2 injection: Study of physical changes in sandstone porous media using Hg porosimetry and 3D pore network models

Local Structural Characteristics of Pore Space in GDLs of PEM Fuel Cells Based on Geometric 3D Graphs

Modelling of porosity and waterfronts in cellulosic pellets for understanding drug release behavior

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