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Article: Flow variation of duckbill valve jet in relation to large elastic deformation

TitleFlow variation of duckbill valve jet in relation to large elastic deformation
Authors
Issue Date2004
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/em.html
Citation
Journal of Engineering Mechanics, 2004, v. 130 n. 8, p. 971-981 How to Cite?
AbstractDuckbill-shaped elastomer valves are often installed on wastewater effluent diffusers, stormwater outfalls, and industrial flow systems to prevent backflow and sediment/salt water intrusion. Unlike fixed diameter nozzles, the flow from a duckbill valve (DBV) depends both on the driving pressure and the size of the valve opening. A nonlinear large deformation finite element analysis of a prototype DBV is reported herein. The elastomer is modeled as a hyperelastic incompressible solid, and the flow inside the DBV, shaped like a converging nozzle, is treated as energy conserving. The deformed valve is computed iteratively from sequential standard large deformation analysis of the internal flow and pressure loading. The calculations show that the valve opening is lip shaped, and the maximum stress occurs around the two sides of the saddle of the DBV; maximum strains are on the order of 5%. In contrast to the traditional square-root head-discharge dependence, a linear pressure-discharge relation is predicted for a range of elastomer thickness; the jet velocity/valve opening area varies nonlinearly with discharge. The normalized predictions of valve discharge flow and opening area as a function of the driving pressure are in excellent agreement with experimental data. © ASCE.
Persistent Identifierhttp://hdl.handle.net/10722/150439
ISSN
2015 Impact Factor: 1.346
2015 SCImago Journal Rankings: 0.747
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLee, JHWen_HK
dc.contributor.authorLo, SHen_HK
dc.contributor.authorLee, KLen_HK
dc.date.accessioned2012-06-26T06:04:48Z-
dc.date.available2012-06-26T06:04:48Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal of Engineering Mechanics, 2004, v. 130 n. 8, p. 971-981en_HK
dc.identifier.issn0733-9399en_HK
dc.identifier.urihttp://hdl.handle.net/10722/150439-
dc.description.abstractDuckbill-shaped elastomer valves are often installed on wastewater effluent diffusers, stormwater outfalls, and industrial flow systems to prevent backflow and sediment/salt water intrusion. Unlike fixed diameter nozzles, the flow from a duckbill valve (DBV) depends both on the driving pressure and the size of the valve opening. A nonlinear large deformation finite element analysis of a prototype DBV is reported herein. The elastomer is modeled as a hyperelastic incompressible solid, and the flow inside the DBV, shaped like a converging nozzle, is treated as energy conserving. The deformed valve is computed iteratively from sequential standard large deformation analysis of the internal flow and pressure loading. The calculations show that the valve opening is lip shaped, and the maximum stress occurs around the two sides of the saddle of the DBV; maximum strains are on the order of 5%. In contrast to the traditional square-root head-discharge dependence, a linear pressure-discharge relation is predicted for a range of elastomer thickness; the jet velocity/valve opening area varies nonlinearly with discharge. The normalized predictions of valve discharge flow and opening area as a function of the driving pressure are in excellent agreement with experimental data. © ASCE.en_HK
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/em.htmlen_HK
dc.relation.ispartofJournal of Engineering Mechanicsen_HK
dc.rightsJournal of Engineering Mechanics. Copyright © American Society of Civil Engineers.-
dc.titleFlow variation of duckbill valve jet in relation to large elastic deformationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9399&volume=130&issue=8&spage=971&epage=981&date=2004&atitle=Flow+variation+of+a+duckbill+valve+jet+in+relation+to+large+elastic+deformation-
dc.identifier.emailLee, JHW: hreclhw@hku.hken_HK
dc.identifier.emailLo, SH: hreclsh@hkucc.hku.hken_HK
dc.identifier.authorityLee, JHW=rp00061en_HK
dc.identifier.authorityLo, SH=rp00223en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1061/(ASCE)0733-9399(2004)130:8(971)en_HK
dc.identifier.scopuseid_2-s2.0-4043058027en_HK
dc.identifier.hkuros90865-
dc.identifier.hkuros238742-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-4043058027&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume130en_HK
dc.identifier.issue8en_HK
dc.identifier.spage971en_HK
dc.identifier.epage981en_HK
dc.identifier.isiWOS:000223001200012-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLee, JHW=36078318900en_HK
dc.identifier.scopusauthoridLo, SH=7401542444en_HK
dc.identifier.scopusauthoridLee, KL=7501505110en_HK

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