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Article: Numerical simulation of pumping tests in multilayer wells with non-Darcian flow in the wellbore

TitleNumerical simulation of pumping tests in multilayer wells with non-Darcian flow in the wellbore
Authors
Issue Date1999
PublisherBlackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1
Citation
Ground Water, 1999, v. 37 n. 3, p. 465-474 How to Cite?
AbstractAn important feature of pumping in a multilayer system is the dynamic interaction between the aquifers via non-Darcian vertical flow within the wellbore. An equivalent hydraulic conductivity (EHC) approach is used to include this transient interaction as a special leakage through the confining layer in the flow system. Different flow regimes (laminar and turbulent flows, and the transition range) are involved in a multilayer pumping test where the relation between the hydraulic gradient and flow velocity is complicated. The change of flow regimes is accommodated by varying the content of EHC as a function of the friction factor. For a particular well, the relation between friction factor and Reynolds number is unique and is obtained by interpolating Nikuradse's experimental results. A quasi-three-dimensional Galerkin finite-element method is used to integrate the vertical one-dimensional flow in the wellbore and confining layers and the two-dimensional flow in the aquifers. This approach makes it possible to couple the aquifer and wellbore flows of different flow regimes and to solve them in a single numerical framework based on the same linear relation between gradient and velocity. A carefully designed pumping test in a multilayer aquifer system near Beihai City, Guangxi Autonomous Region, China, is used to demonstrate the performance of the approach. | An important feature of pumping in a multilayer system is the dynamic interaction between the aquifers via non-Darcian vertical flow within the wellbore. An equivalent hydraulic conductivity (EHC) approach is used to include this transient interaction as a special leakage through the confining layer in the flow system. Different flow regimes (laminar and turbulent flows, and the transition range) are involved in a multilayer pumping test where the relation between the hydraulic gradient and flow velocity is complicated. The change of flow regimes is accommodated by varying the content of EHC as a function of the friction factor. For a particular well, the relation between friction factor and Reynolds number is unique and is obtained by interpolating Nikuradse's experimental results. A quasi-three-dimensional Galerkin finite-element method is used to integrate the vertical one-dimensional flow in the wellbore and confining layers and the two-dimensional flow in the aquifers. This approach makes it possible to couple the aquifer and wellbore flows of different flow regimes and to solve them in a single numerical framework based on the same linear relation between gradient and velocity. A carefully designed pumping test in a multilayer aquifer system near Beihai City, Guangxi Autonomous Region, China, is used to demonstrate the performance of the approach.
Persistent Identifierhttp://hdl.handle.net/10722/72736
ISSN
2015 Impact Factor: 1.947
2015 SCImago Journal Rankings: 1.111
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Cen_HK
dc.contributor.authorJiao, JJen_HK
dc.date.accessioned2010-09-06T06:44:37Z-
dc.date.available2010-09-06T06:44:37Z-
dc.date.issued1999en_HK
dc.identifier.citationGround Water, 1999, v. 37 n. 3, p. 465-474en_HK
dc.identifier.issn0017-467Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/72736-
dc.description.abstractAn important feature of pumping in a multilayer system is the dynamic interaction between the aquifers via non-Darcian vertical flow within the wellbore. An equivalent hydraulic conductivity (EHC) approach is used to include this transient interaction as a special leakage through the confining layer in the flow system. Different flow regimes (laminar and turbulent flows, and the transition range) are involved in a multilayer pumping test where the relation between the hydraulic gradient and flow velocity is complicated. The change of flow regimes is accommodated by varying the content of EHC as a function of the friction factor. For a particular well, the relation between friction factor and Reynolds number is unique and is obtained by interpolating Nikuradse's experimental results. A quasi-three-dimensional Galerkin finite-element method is used to integrate the vertical one-dimensional flow in the wellbore and confining layers and the two-dimensional flow in the aquifers. This approach makes it possible to couple the aquifer and wellbore flows of different flow regimes and to solve them in a single numerical framework based on the same linear relation between gradient and velocity. A carefully designed pumping test in a multilayer aquifer system near Beihai City, Guangxi Autonomous Region, China, is used to demonstrate the performance of the approach. | An important feature of pumping in a multilayer system is the dynamic interaction between the aquifers via non-Darcian vertical flow within the wellbore. An equivalent hydraulic conductivity (EHC) approach is used to include this transient interaction as a special leakage through the confining layer in the flow system. Different flow regimes (laminar and turbulent flows, and the transition range) are involved in a multilayer pumping test where the relation between the hydraulic gradient and flow velocity is complicated. The change of flow regimes is accommodated by varying the content of EHC as a function of the friction factor. For a particular well, the relation between friction factor and Reynolds number is unique and is obtained by interpolating Nikuradse's experimental results. A quasi-three-dimensional Galerkin finite-element method is used to integrate the vertical one-dimensional flow in the wellbore and confining layers and the two-dimensional flow in the aquifers. This approach makes it possible to couple the aquifer and wellbore flows of different flow regimes and to solve them in a single numerical framework based on the same linear relation between gradient and velocity. A carefully designed pumping test in a multilayer aquifer system near Beihai City, Guangxi Autonomous Region, China, is used to demonstrate the performance of the approach.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1en_HK
dc.relation.ispartofGround Wateren_HK
dc.titleNumerical simulation of pumping tests in multilayer wells with non-Darcian flow in the wellboreen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0017-467X&volume=37&issue=3&spage=465&epage=474&date=1999&atitle=Numerical+Simulation+of+Pumping+Tests+in+Multilayer+Wells+with+Non-Darcian+Flow+in+the+Wellboreen_HK
dc.identifier.emailJiao, JJ:jjiao@hku.hken_HK
dc.identifier.authorityJiao, JJ=rp00712en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-13044312100en_HK
dc.identifier.hkuros46672en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-13044312100&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue3en_HK
dc.identifier.spage465en_HK
dc.identifier.epage474en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChen, C=14027847300en_HK
dc.identifier.scopusauthoridJiao, JJ=7102382963en_HK

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