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Article: Homogenization theory applied to soil vapor extraction in aggregated soils

TitleHomogenization theory applied to soil vapor extraction in aggregated soils
Authors
Issue Date1996
PublisherAmerican Institute of Physics. The Journal's web site is located at http://ojps.aip.org/phf
Citation
Physics Of Fluids, 1996, v. 8 n. 9, p. 2298-2306 How to Cite?
AbstractThe macroscale equations governing the convective diffusion of a volatile organic compound during soil vapor extraction in the vadose zone composed of aggregated soils are derived systematically. Although the macroscale effective equations of flow and chemical transport can be developed by intuitive arguments, a formal derivation is presented by the theory of homogenization in order to prescribe precisely the underlying assumptions and the degree of accuracy, and to prepare grounds for further extensions to three-scaled media. Specifically the basic assumptions are (i) the soil matrix is composed of a nearly periodic array of spherical aggregates, (ii) within an aggregate water is immobile because of capillarity and viscous forces, (iii) the aggregates are much smaller than the macroscale. and (iv) diffusion in the aggregates is much weaker than that in the pore air. Local equilibrium is confirmed as a limiting case of the present theory when the aggregate diffusion time is much shorter than the global advection time. © 1996 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/156447
ISSN
2015 Impact Factor: 2.017
2015 SCImago Journal Rankings: 1.036
References

 

DC FieldValueLanguage
dc.contributor.authorNg, COen_US
dc.contributor.authorMei, CCen_US
dc.date.accessioned2012-08-08T08:42:28Z-
dc.date.available2012-08-08T08:42:28Z-
dc.date.issued1996en_US
dc.identifier.citationPhysics Of Fluids, 1996, v. 8 n. 9, p. 2298-2306en_US
dc.identifier.issn1070-6631en_US
dc.identifier.urihttp://hdl.handle.net/10722/156447-
dc.description.abstractThe macroscale equations governing the convective diffusion of a volatile organic compound during soil vapor extraction in the vadose zone composed of aggregated soils are derived systematically. Although the macroscale effective equations of flow and chemical transport can be developed by intuitive arguments, a formal derivation is presented by the theory of homogenization in order to prescribe precisely the underlying assumptions and the degree of accuracy, and to prepare grounds for further extensions to three-scaled media. Specifically the basic assumptions are (i) the soil matrix is composed of a nearly periodic array of spherical aggregates, (ii) within an aggregate water is immobile because of capillarity and viscous forces, (iii) the aggregates are much smaller than the macroscale. and (iv) diffusion in the aggregates is much weaker than that in the pore air. Local equilibrium is confirmed as a limiting case of the present theory when the aggregate diffusion time is much shorter than the global advection time. © 1996 American Institute of Physics.en_US
dc.languageengen_US
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://ojps.aip.org/phfen_US
dc.relation.ispartofPhysics of Fluidsen_US
dc.titleHomogenization theory applied to soil vapor extraction in aggregated soilsen_US
dc.typeArticleen_US
dc.identifier.emailNg, CO:cong@hku.hken_US
dc.identifier.authorityNg, CO=rp00224en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0030480918en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030480918&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume8en_US
dc.identifier.issue9en_US
dc.identifier.spage2298en_US
dc.identifier.epage2306en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridNg, CO=7401705594en_US
dc.identifier.scopusauthoridMei, CC=35299759800en_US

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