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The role of eddies in solute transport and recovery in rock fractures: implication for groundwater remediation

Cited 9 time in wos
Cited 10 time in scopus

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dc.contributor.authorLee, Seung Hyoun-
dc.contributor.authorLee, Won Sang-
dc.contributor.authorLee, Kang-Kun-
dc.contributor.authorYeo, In Wook-
dc.date.accessioned2018-03-20T13:41:27Z-
dc.date.available2018-03-20T13:41:27Z-
dc.date.issued2017-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/6112-
dc.description.abstractA better understanding of solute transport and retention mechanism in rock fractures has been challenging due to difficulty in their direct observations in microscale rough-walled fractures. Six representative troughs in a rough-walled fracture were selected for microscale observations of eddy formation with increasing flow velocity and its effect on spatiotemporal changes of solute concentration. This experimental study was enabled by a microscale visualization technique of micro particle image velocimetry. With increasing flow velocity (Re ≤ 2.86), no eddies were generated, and solutes along the main streamlines transported rapidly, whereas those near the wall moved slowly. A larger amount of solutes remained trapped at all troughs at Re = 2.86 than Re < 1. For Re = 8.57, weak eddies started to be developed at the troughs on the lee side, which little contributed to overall solute flushing in the fracture. Accordingly, a large of amount of water was needed for solute flushing. The flow condition of 1 < Re < 10, before a full development of eddies, was least favourable in terms of time and amount of remediation fluid required to reach a target concentration. After large eddies were fully developed at troughs on the lee side for Re = 17.13, solutes were substantially reduced by eddies with less amount of water. Fully developed eddies were found to enhance solute transport and recovery, as opposed to a general consensus that eddies trap and delay solutes. Direct inflow into troughs on the stoss side also made a great contribution to solute flushing out of the troughs. This study indicates that fully developed eddies or strong inflows at troughs are highly possible to form for Re > 10 and this flow range could be favourable for efficient remediation.-
dc.languageEnglish-
dc.titleThe role of eddies in solute transport and recovery in rock fractures: implication for groundwater remediation-
dc.title.alternative암반 단열 내에 와류의 형성이 용질 거동 및 정화에 미치는 영향: 지하수 오염 저감 관점에서의 의미-
dc.typeArticle-
dc.identifier.bibliographicCitationLee, Seung Hyoun, et al. 2017. "The role of eddies in solute transport and recovery in rock fractures: implication for groundwater remediation". <em>HYDROLOGICAL PROCESSES</em>, 31(20): 3580-3587.-
dc.citation.titleHYDROLOGICAL PROCESSES-
dc.citation.volume31-
dc.citation.number20-
dc.identifier.doi10.1002/hyp.11283-
dc.citation.startPage3580-
dc.citation.endPage3587-
dc.description.articleClassificationSCI-
dc.description.jcrRateJCR 2015:9.412-
dc.subject.keywordeddies-
dc.subject.keywordimmobile fluid zone-
dc.subject.keywordrock fracture-
dc.subject.keywordsolute transport-
dc.subject.keywordvisualization technique-
dc.subject.keywordWater Resources-
dc.identifier.localId2017-0226-
dc.identifier.scopusid2-s2.0-85029811378-
dc.identifier.wosid000410745000010-
Appears in Collections  
2014-2018, Investigating Cryospheric Evolution of the Victoria Land, Antarctica -ICE- (14-18) / Lee, Won Sang (PM14020; PM15020; PM16020; PM17020)
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