47 research outputs found
AnĂĄlise de um compĂłsito complexo por microscopia eletrĂŽnica digital e anĂĄlise de imagens
Leadership, management and teamwork learning through an extra-curricular project for medical students: descriptive study
Use of the mar-lin criteria to determine the influence of porosity on the iosipescu and short beam shear properties in carbon fiber polymer matrix composites
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Assessment of Specimen Noise in HREM Images of Simple Structures
Quantifying Enhanced Oil Recovery in Synthetic Media with MicroCT
International audienceEnhanced oil recovery methods are tested and optimized in syntheticmedia, emulating porosity and permeability of real oil-bearing rocks.Such a medium was produced with sintered bi-disperse glass beads andmicroCT images (4 ”m resolution) were acquired at different stages offluid motion through the medium. Synthetic seawater with or without oil/water emulsion was used to recover oil previously saturating the mediumŽspores. The water was doped with KI to fine tune X-ray absorption. Thus,3D images showing the beads, doped water and residual oil presenteda 3-modal histogram. After denoising with a non-local means filter, theimages were segmented and the distribution of residual oil ganglia wasvisualized and quantified. Probability density functions of volumes (~10^4ganglia spanning 8 orders of magnitude) show well defined exponentialbehaviors for the displacement of oil by water, while the use of emulsionsprovides better recovery efficiency with larger numbers of larger gangli