Propagating compaction bands in confined compression of snow
نویسندگان
چکیده
منابع مشابه
Compaction Bands in Porous Rock
Compaction bands are localized, planar zones of compressed material that form perpendicular to the maximum compressive stress. Compaction bands have been observed in porous sandstone formations in the field and in laboratory compression tests on porous sandstone, plaster, glass beads, polycarbonate honeycombs and metal foams. Because the permeability of the compacted material is much reduced, c...
متن کاملTheory of Compaction Bands in Porous Rock
Compaction bands are narrow planar zones of localized purely compressive (without shear) deformation that form perpendicular to the most compressive principal stress. Such bands have been observed in high porosity rocks in the laboratory and in the field. Because compaction presumably decreases permeability, these bands can act as barriers to flow within reservoirs. Reexamination of the results...
متن کاملCompaction of granular material inside confined geometries
In both nature and engineering, loosely packed granular materials are often compacted inside confined geometries. Here, we explore such behavior in a quasi-two dimensional geometry, where parallel rigid walls provide the confinement. We use the discrete element method to investigate the stress distribution developed within the granular packing as a result of compaction due to the displacement o...
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Three-dimensional computer graphic techniques are applied to the processing of snowstorm radar data. The following techniques are examined: 1) perspective representation of radar data; 2) zooming; 3) change in viewing angle and viewing point; 4) arbitrary cross-sectional analysis; and 5) time sequence analysis of perspective
متن کاملPermeability measurements inside compaction bands In situ permeability measurements inside compaction bands using X-ray CT and lattice Boltzmann calculations
The paper presents some results of the characterization of microstuctural differences inside and outside compaction bands in natural sandstone. Specimens of Aztec sandstone were scanned at the synchrotron APS, at Argonne National Laboratory (USA). Porosity measurements obtained by image analysis show a sharp transition inside/outside the compaction band. Finally, preliminary permeability measur...
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ژورنال
عنوان ژورنال: Nature Physics
سال: 2016
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys3966