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Article: A model for flow induced by steady air venting and air sparging

TitleA model for flow induced by steady air venting and air sparging
Authors
KeywordsAir sparging
Air venting
Groundwater remediation
Subsurface flow
Issue Date2002
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/apm
Citation
Applied Mathematical Modelling, 2002, v. 26 n. 7, p. 727-750 How to Cite?
AbstractA numerical model for the axisymmetric subsurface flow during steady air venting and/or sparging from underground wells along the same vertical axis is presented. A common observation that for steady air injection or extraction, motion of the groundwater is negligible is first justified theoretically. Thus in the two-phase problem, only air is moving, while water remains stationary. Nevertheless there can be significant changes in water saturation because the capillary pressure varies nonlinearly with the air saturation. For pure air venting, the effects of upconing of the water table are studied. For pure air sparging, the role of air compressibility ignored by earlier authors is reassessed, and issues of design interest such as the radius of influence and discharge rates are examined. Comparisons with published measurements are discussed. Physical implications of concurrent venting and sparging are also discussed. © 2002 Elsevier Science Inc. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/75920
ISSN
2015 Impact Factor: 2.291
2015 SCImago Journal Rankings: 1.318
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorMei, CCen_HK
dc.contributor.authorCheng, Zen_HK
dc.contributor.authorNg, COen_HK
dc.date.accessioned2010-09-06T07:15:51Z-
dc.date.available2010-09-06T07:15:51Z-
dc.date.issued2002en_HK
dc.identifier.citationApplied Mathematical Modelling, 2002, v. 26 n. 7, p. 727-750en_HK
dc.identifier.issn0307-904Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/75920-
dc.description.abstractA numerical model for the axisymmetric subsurface flow during steady air venting and/or sparging from underground wells along the same vertical axis is presented. A common observation that for steady air injection or extraction, motion of the groundwater is negligible is first justified theoretically. Thus in the two-phase problem, only air is moving, while water remains stationary. Nevertheless there can be significant changes in water saturation because the capillary pressure varies nonlinearly with the air saturation. For pure air venting, the effects of upconing of the water table are studied. For pure air sparging, the role of air compressibility ignored by earlier authors is reassessed, and issues of design interest such as the radius of influence and discharge rates are examined. Comparisons with published measurements are discussed. Physical implications of concurrent venting and sparging are also discussed. © 2002 Elsevier Science Inc. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/apmen_HK
dc.relation.ispartofApplied Mathematical Modellingen_HK
dc.rightsApplied Mathematical Modelling. Copyright © Elsevier Inc.en_HK
dc.subjectAir spargingen_HK
dc.subjectAir ventingen_HK
dc.subjectGroundwater remediationen_HK
dc.subjectSubsurface flowen_HK
dc.titleA model for flow induced by steady air venting and air spargingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0307-904X&volume=26&issue=7&spage=727&epage=750&date=2002&atitle=A+model+for+flow+induced+by+steady+air+venting+and+air+spargingen_HK
dc.identifier.emailNg, CO:cong@hku.hken_HK
dc.identifier.authorityNg, CO=rp00224en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0307-904X(01)00083-Xen_HK
dc.identifier.scopuseid_2-s2.0-0036645378en_HK
dc.identifier.hkuros78463en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036645378&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue7en_HK
dc.identifier.spage727en_HK
dc.identifier.epage750en_HK
dc.identifier.isiWOS:000176145200001-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridMei, CC=7103364150en_HK
dc.identifier.scopusauthoridCheng, Z=15826257000en_HK
dc.identifier.scopusauthoridNg, CO=7401705594en_HK

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