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Article: Modelling the kinetics of aggregate breakage using improved breakage kernel

TitleModelling the kinetics of aggregate breakage using improved breakage kernel
Authors
KeywordsAggregate
Breakage kernel
Fractal dimension
Particle size distribution
Shear
Issue Date2008
PublisherI W A Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwst
Citation
Water Science And Technology, 2008, v. 57 n. 1, p. 151-157 How to Cite?
AbstractAn improved breakage kernel was developed to describe the kinetics of aggregate breakage induced by fluid shear. The model includes the effects of both the internal bonding forces of an aggregate and the fluid shear stress exerting on the aggregate. The ratio of the two opposite forces regulates the probability of the aggregate breakage. With the improved breakage model and the sectional numerical technique, the breakage dominant process can be well simulated by the change in particle size distribution (PSD). The results show that the fractal dimension plays a significant role in the breakage process. AS the fractal dimension approaches three, the aggregates become more difficult to break. Higher shear intensity, to a great extent, enhances the breakage kinetics. The internal forces are directly related to the bonding strength of the aggregates. Hydrophobic forces increase the floc strength and hence reduce the breakage rate and probability. In addition, two distinct breakage daughter distribution functions, binary and ternary, give eventually almost the same results in PSID after breakage. It appears that the breakage daughter distribution function is less important for the description of the particle fragmentation. © IWA Publishing 2008.
Persistent Identifierhttp://hdl.handle.net/10722/58492
ISSN
2015 Impact Factor: 1.064
2015 SCImago Journal Rankings: 0.469
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXiao, Fen_HK
dc.contributor.authorLi, XYen_HK
dc.date.accessioned2010-05-31T03:31:23Z-
dc.date.available2010-05-31T03:31:23Z-
dc.date.issued2008en_HK
dc.identifier.citationWater Science And Technology, 2008, v. 57 n. 1, p. 151-157en_HK
dc.identifier.issn0273-1223en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58492-
dc.description.abstractAn improved breakage kernel was developed to describe the kinetics of aggregate breakage induced by fluid shear. The model includes the effects of both the internal bonding forces of an aggregate and the fluid shear stress exerting on the aggregate. The ratio of the two opposite forces regulates the probability of the aggregate breakage. With the improved breakage model and the sectional numerical technique, the breakage dominant process can be well simulated by the change in particle size distribution (PSD). The results show that the fractal dimension plays a significant role in the breakage process. AS the fractal dimension approaches three, the aggregates become more difficult to break. Higher shear intensity, to a great extent, enhances the breakage kinetics. The internal forces are directly related to the bonding strength of the aggregates. Hydrophobic forces increase the floc strength and hence reduce the breakage rate and probability. In addition, two distinct breakage daughter distribution functions, binary and ternary, give eventually almost the same results in PSID after breakage. It appears that the breakage daughter distribution function is less important for the description of the particle fragmentation. © IWA Publishing 2008.en_HK
dc.languageengen_HK
dc.publisherI W A Publishing. The Journal's web site is located at http://www.iwapublishing.com/template.cfm?name=iwapwsten_HK
dc.relation.ispartofWater Science and Technologyen_HK
dc.rightsWater Science and Technology. Copyright © I W A Publishing.-
dc.subjectAggregateen_HK
dc.subjectBreakage kernelen_HK
dc.subjectFractal dimensionen_HK
dc.subjectParticle size distributionen_HK
dc.subjectShearen_HK
dc.subject.meshAlgorithms-
dc.subject.meshFlocculation-
dc.subject.meshHydrophobic and Hydrophilic Interactions-
dc.subject.meshKinetics-
dc.subject.meshModels, Theoretical-
dc.titleModelling the kinetics of aggregate breakage using improved breakage kernelen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0273-1223&volume=57&issue=1&spage=151&epage=157&date=2008&atitle=Modelling+the+kinetics+of+aggregate+breakage+using+an+improved+breakage+kernelen_HK
dc.identifier.emailLi, XY:xlia@hkucc.hku.hken_HK
dc.identifier.authorityLi, XY=rp00222en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.2166/wst.2008.789en_HK
dc.identifier.pmid18192753-
dc.identifier.scopuseid_2-s2.0-39449100016en_HK
dc.identifier.hkuros164532en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-39449100016&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume57en_HK
dc.identifier.issue1en_HK
dc.identifier.spage151en_HK
dc.identifier.epage157en_HK
dc.identifier.isiWOS:000253061000021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridXiao, F=7201709645en_HK
dc.identifier.scopusauthoridLi, XY=26642887900en_HK

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