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Article: Numerical simulation of pumping tests in multilayer wells with non-Darcian flow in the wellbore
Title | Numerical simulation of pumping tests in multilayer wells with non-Darcian flow in the wellbore |
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Authors | |
Issue Date | 1999 |
Publisher | Blackwell 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? |
Abstract | 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. | 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 Identifier | http://hdl.handle.net/10722/72736 |
ISSN | 2023 Impact Factor: 2.0 2023 SCImago Journal Rankings: 0.653 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Chen, C | en_HK |
dc.contributor.author | Jiao, JJ | en_HK |
dc.date.accessioned | 2010-09-06T06:44:37Z | - |
dc.date.available | 2010-09-06T06:44:37Z | - |
dc.date.issued | 1999 | en_HK |
dc.identifier.citation | Ground Water, 1999, v. 37 n. 3, p. 465-474 | en_HK |
dc.identifier.issn | 0017-467X | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/72736 | - |
dc.description.abstract | 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. | 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.language | eng | en_HK |
dc.publisher | Blackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1 | en_HK |
dc.relation.ispartof | Ground Water | en_HK |
dc.title | Numerical simulation of pumping tests in multilayer wells with non-Darcian flow in the wellbore | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+Wellbore | en_HK |
dc.identifier.email | Jiao, JJ:jjiao@hku.hk | en_HK |
dc.identifier.authority | Jiao, JJ=rp00712 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.scopus | eid_2-s2.0-13044312100 | en_HK |
dc.identifier.hkuros | 46672 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-13044312100&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 37 | en_HK |
dc.identifier.issue | 3 | en_HK |
dc.identifier.spage | 465 | en_HK |
dc.identifier.epage | 474 | en_HK |
dc.identifier.isi | WOS:000080051100023 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Chen, C=14027847300 | en_HK |
dc.identifier.scopusauthorid | Jiao, JJ=7102382963 | en_HK |
dc.identifier.issnl | 0017-467X | - |