A re-examination of throats

Handle URI:
http://hdl.handle.net/10754/552171
Title:
A re-examination of throats
Authors:
Kim, J.-W.; Kim, D.; Lindquist, W. B.
Abstract:
We critically re-examine the concept of a throat in a porous medium as a geometric quantity defined independently of an entry meniscus in a drainage process. To maintain the standard notion of a throat as a locally minimum-area cross section in the pore network, we demonstrate with examples that throats must intersect each other. Using flow simulation, we show that these intersecting throats correspond to capillary pressure controlled entry points during drainage. We have designed a throat-finding algorithm that explicitly locates intersecting throats, using a planar approximation for robustness and speed. The capability of the new algorithm was compared against an existing algorithm in the construction of pore-throat networks from X-ray computed tomography images of consolidated sandstones (7.5–22% porosity) and of an unconsolidated sand pack (32.5% porosity). We show that the probability of throat intersection increases significantly with porosity above 20%; in the sand pack, over 1/4 of all throats intersect with another.
KAUST Department:
Clean Combustion Research Center; Center for Uncertainty Quantification in Computational Science and Engineering (SRI-UQ)
Citation:
A re-examination of throats 2013, 49 (11):7615 Water Resources Research
Journal:
Water Resources Research
Issue Date:
Nov-2013
DOI:
10.1002/2013WR014254
Type:
Article
ISSN:
00431397
Additional Links:
http://doi.wiley.com/10.1002/2013WR014254
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, J.-W.en
dc.contributor.authorKim, D.en
dc.contributor.authorLindquist, W. B.en
dc.date.accessioned2015-05-04T16:36:03Zen
dc.date.available2015-05-04T16:36:03Zen
dc.date.issued2013-11en
dc.identifier.citationA re-examination of throats 2013, 49 (11):7615 Water Resources Researchen
dc.identifier.issn00431397en
dc.identifier.doi10.1002/2013WR014254en
dc.identifier.urihttp://hdl.handle.net/10754/552171en
dc.description.abstractWe critically re-examine the concept of a throat in a porous medium as a geometric quantity defined independently of an entry meniscus in a drainage process. To maintain the standard notion of a throat as a locally minimum-area cross section in the pore network, we demonstrate with examples that throats must intersect each other. Using flow simulation, we show that these intersecting throats correspond to capillary pressure controlled entry points during drainage. We have designed a throat-finding algorithm that explicitly locates intersecting throats, using a planar approximation for robustness and speed. The capability of the new algorithm was compared against an existing algorithm in the construction of pore-throat networks from X-ray computed tomography images of consolidated sandstones (7.5–22% porosity) and of an unconsolidated sand pack (32.5% porosity). We show that the probability of throat intersection increases significantly with porosity above 20%; in the sand pack, over 1/4 of all throats intersect with another.en
dc.relation.urlhttp://doi.wiley.com/10.1002/2013WR014254en
dc.rightsArchived with thanks to Water Resources Researchen
dc.titleA re-examination of throatsen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentCenter for Uncertainty Quantification in Computational Science and Engineering (SRI-UQ)en
dc.identifier.journalWater Resources Researchen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Applied Mathematics and Statistics; Stony Brook University; Stony Brook New York USAen
dc.contributor.institutionDepartment of Applied Mathematics and Statistics; Stony Brook University; Stony Brook New York USAen
kaust.authorKim, Daesangen
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