New algorithms in 3D image analysis and their application to the measurement of a spatialized pore size distribution in soils

Delerue, Jean-François; Perrier, Edith; Zhou, Yu; Velde, B.

doi:10.1016/s1464-1895(99)00093-9

Cited by 109 publications

(61 citation statements)

References 9 publications

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“…However, beyond the modelling efforts required for seeking the solution, the complexity of the porosity architecture does not allow in our case this system to be solved easily. Even numerically, the various porosity shapes which exist at the different scales cannot be easily represented without turning to more refined descriptions such those adopted in [10] or [7] for example. In the present approach, these equations will be solved through fluid mechanics finite element (FE) analysis in a simplified framework, following the experimental evidences demonstrated in the measurements.…”

Section: Flow Through Porous Mediamentioning

confidence: 99%

“…In the case of composites ( [10], [21]), starting from micrographs the identification of pores at micro and meso scales is deduced from the probabilistic treatment that a segment of length l fits in a pore in a given direction. For soils [7], the pore network is reconstructed from 3D image analyses, after skeletization and creation of a spatialized local pore size distribution. Then the 'conductivity' of the network is evaluated, especially fluid invasion is shown to be controlled by the connectivity between the largest pores.…”

Section: Through-thickness Permeability Predictionsmentioning

confidence: 99%

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Influence of the stitching density on the transverse permeability of non-crimped new concept (NC2) multiaxial reinforcements: measurements and predictions

Drapier

2002

Composites Science and Technology

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. Influence of the stitching density on the transverse permeability of Non-Crimped New Concept (NC2) multiaxial reinforcements : measurements and predictions. Composites Science and Technology, Elsevier, 2002, 62 (15), pp.1979. <10.1016 AbstractNew manufacturing processes arise for polymer-based composites which involve resin infusion through dry pre-forms. Modelling approaches of these processes require to assess new physical characteristics of the materials. In this paper, the transverse permeability of new multiaxial stitched materials, referred to as NC2, is investigated. First, in the framework of Darcy's flows, this permeability is assessed for various biaxial NC2 using a specific device. Through this approach it is shown that the transverse permeability depends strongly on the stitching density. Then, the results from a simplified FE study carried out at the blanket scale are shown to correlate quite well the experimental measurements and evidences established in the first part.

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Section: Flow Through Porous Mediamentioning

confidence: 99%

Section: Through-thickness Permeability Predictionsmentioning

confidence: 99%

Influence of the stitching density on the transverse permeability of non-crimped new concept (NC2) multiaxial reinforcements: measurements and predictions

Drapier

2002

Composites Science and Technology

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“…The local aperture diameter OuvðPÞ is defined at any point P of an object as the diameter of the largest ball included in the object and containing the point P, as proposed by Ref. 25).…”

Section: Aperture Diametermentioning

confidence: 99%

Open Celled Material Structural Properties Measurement: From Morphology To Transport Properties

2006

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Metallic foams are highly porous materials which present complex structure of three-dimensional open cells. The effective transport properties determination is essential for these widely used new materials. The aim of this work is to develop morphology analysis tools to study the impact of foams structure on physical transport properties. The reconstruction of the solid-pore interface allows the visualization of the 3D data and determination of specific surface and porosity. We present an original method to measure the geometrical tortuosity of a porous media for the two phases. A centerline extraction method allows us to model the solid matrix as a network of linear connected segments. The thermal conductivity of metallic foams is determined by solving energy equation over the solid phase skeleton. Results obtained on a set of nickel foams covering a wide range of pore size are discussed.

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“…Recent advances in X-ray computed microtomography (CµT) have considerably improved the direct measurement of multi-granular porous media structure Lindquist et al, 1996;Delerue et al, 1999;Lindquist and Venkatarangen, 2000;Proussevitch and Sahagian, 2001). CµT is a 3D nondestructive radiographic imaging technique with a spatial resolution limited by the width of the beam, the scintillator efficiency, the number of pixels on the camera and the X-ray absorption coefficient of the rock-forming minerals.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic Properties and Microgeometry Evolution Accompanying Limestone Dissolution by Acidic Water

Noiriel

Bernard

Gouze

et al. 2005

Oil & Gas Science and Technology - Rev. IFP

103

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Résumé -Évolution des paramètres hydrauliques et de la microgéométrie d'un calcaire pendant sa dissolution par une eau acide -Nous reportons dans cet article les résultats d'une expérience de percolation réactive menée, à température ambiante, dans un calcaire poreux par une eau saturée en CO 2 à la pression partielle de 0,1 MPa, afin d'évaluer les relations entre la chimie de l'eau et les modifications hydrodynamiques et structurales de l'échantillon. Une méthode d'analyse, basée sur l'utilisation répétée de l'imagerie microtomographique à rayons X, a été développée pour suivre en détail l'évolution de la structure et de l'interface fluide-solide de l'échantillon, tandis que sa porosité et sa perméabilité augmentaient au cours de sa dissolution. Plusieurs mécanismes à l'origine de l'augmentation rapide de la perméa-bilité ont été identifiés. Au début de l'expérience, cette augmentation a été reliée à la dissolution et à la migration concomitantes de particules carbonatées. Ensuite, la perméabilité a continué d'augmenter par suite de la dissolution des aspérités à l'interface fluide-solide, et de l'accroissement de la connectivité du réseau poral. Abstract -Hydraulic Properties and Microgeometry Evolution Accompanying Limestone Dissolution By Acidic Water -A reactive flow-through experiment by carbon dioxide-saturated water at the partial pressure of 0.1 MPa and room temperature was conducted on a porous limestone in order to identify the relationships between fluid chemistry, hydrodynamics and structural properties. Periodic imaging by nondestructive X-ray microtomography allowed following the evolution of the core micro-geometry and fluid-rock interface in detail while its porosity and permeability increased due to dissolution. Several mechanisms were successively involved in the rapid permeability increase. Early in the experiment, the permeability increase was related to concomitant particle dissolution and displacement. Later on, permeability continued to rise due to solid-fluid interface smoothing and to pore connectivity increase.

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New algorithms in 3D image analysis and their application to the measurement of a spatialized pore size distribution in soils

Cited by 109 publications

References 9 publications

Influence of the stitching density on the transverse permeability of non-crimped new concept (NC2) multiaxial reinforcements: measurements and predictions

Influence of the stitching density on the transverse permeability of non-crimped new concept (NC2) multiaxial reinforcements: measurements and predictions

Open Celled Material Structural Properties Measurement: From Morphology To Transport Properties

Hydraulic Properties and Microgeometry Evolution Accompanying Limestone Dissolution by Acidic Water

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