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Article: Analysis of three-dimensional flow in a cylindrical sediment oxygen demand chamber

TitleAnalysis of three-dimensional flow in a cylindrical sediment oxygen demand chamber
Authors
KeywordsSediment oxygen demand
Laminar swirling flow
Computational fluid dynamics
Finite volume method
Issue Date2000
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/apm
Citation
Applied Mathematical Modelling, 2000, v. 24 n. 4, p. 263-278 How to Cite?
AbstractThe rate of consumption of dissolved oxygen at the bottom of a river or coastal water is often measured in situ by a sediment oxygen demand (SOD) chamber. A continuous flow is generated above the sediment, and the SOD is determined from the difference in oxygen concentrations in the inflow and outflow. The steady three-dimensional swirling laminar flow field inside a cylindrical SOD chamber previously used in field investigations is computed using the finite volume method on an unstructured tetrahedral mesh. The numerical predictions reveal a highly complicated flow characterized by (i) a mainly tangential and near-uniform flow along the circumference in the horizontal layers; (ii) significant reverse bottom currents; and (iii) strong swirl induced by the jet momentum in the vertical section. The computed scalar field suggests that good mixing is achieved within the chamber. The computed velocity and scalar field are well supported by laboratory velocity measurements using laser-Doppler anemometry (LDA), and measured concentrations in a tracer experiment. The present study elucidates the fluid mechanics of an important type of SOD chamber design often used in environmental water quality studies.
Persistent Identifierhttp://hdl.handle.net/10722/70649
ISSN
2015 Impact Factor: 2.291
2015 SCImago Journal Rankings: 1.318

 

DC FieldValueLanguage
dc.contributor.authorLee, JHW-
dc.contributor.authorKuang, CP-
dc.contributor.authorYung, KS-
dc.date.accessioned2010-09-06T06:24:52Z-
dc.date.available2010-09-06T06:24:52Z-
dc.date.issued2000-
dc.identifier.citationApplied Mathematical Modelling, 2000, v. 24 n. 4, p. 263-278-
dc.identifier.issn0307-904X-
dc.identifier.urihttp://hdl.handle.net/10722/70649-
dc.description.abstractThe rate of consumption of dissolved oxygen at the bottom of a river or coastal water is often measured in situ by a sediment oxygen demand (SOD) chamber. A continuous flow is generated above the sediment, and the SOD is determined from the difference in oxygen concentrations in the inflow and outflow. The steady three-dimensional swirling laminar flow field inside a cylindrical SOD chamber previously used in field investigations is computed using the finite volume method on an unstructured tetrahedral mesh. The numerical predictions reveal a highly complicated flow characterized by (i) a mainly tangential and near-uniform flow along the circumference in the horizontal layers; (ii) significant reverse bottom currents; and (iii) strong swirl induced by the jet momentum in the vertical section. The computed scalar field suggests that good mixing is achieved within the chamber. The computed velocity and scalar field are well supported by laboratory velocity measurements using laser-Doppler anemometry (LDA), and measured concentrations in a tracer experiment. The present study elucidates the fluid mechanics of an important type of SOD chamber design often used in environmental water quality studies.-
dc.languageeng-
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/apm-
dc.relation.ispartofApplied Mathematical Modelling-
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in [Journal title]. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in PUBLICATION, [VOL#, ISSUE#, (DATE)] DOI# -
dc.subjectSediment oxygen demand-
dc.subjectLaminar swirling flow-
dc.subjectComputational fluid dynamics-
dc.subjectFinite volume method-
dc.titleAnalysis of three-dimensional flow in a cylindrical sediment oxygen demand chamber-
dc.typeArticle-
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0307-904X&volume=24 2000&spage=263 &epage= 278&date=2000&atitle=Analysis+of+three-dimensional+flow+in+cylindrical+sediment+oxygen+demand+(SOD)+chamberen_HK
dc.identifier.emailLee, JHW: hreclhw@hku.hk-
dc.identifier.authorityLee, JHW=rp00061-
dc.identifier.doi10.1016/S0307-904X(99)00035-9-
dc.identifier.hkuros48356-
dc.identifier.volume24-
dc.identifier.issue4-
dc.identifier.spage263-
dc.identifier.epage278-
dc.publisher.placeUnited States-

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