The role of eddies in solute transport and recovery in rock fractures: implication for groundwater remediation
DC Field | Value | Language |
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dc.contributor.author | Lee, Seung Hyoun | - |
dc.contributor.author | Lee, Won Sang | - |
dc.contributor.author | Lee, Kang-Kun | - |
dc.contributor.author | Yeo, In Wook | - |
dc.date.accessioned | 2018-03-20T13:41:27Z | - |
dc.date.available | 2018-03-20T13:41:27Z | - |
dc.date.issued | 2017 | - |
dc.identifier.uri | https://repository.kopri.re.kr/handle/201206/6112 | - |
dc.description.abstract | A 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.language | English | - |
dc.title | The role of eddies in solute transport and recovery in rock fractures: implication for groundwater remediation | - |
dc.title.alternative | 암반 단열 내에 와류의 형성이 용질 거동 및 정화에 미치는 영향: 지하수 오염 저감 관점에서의 의미 | - |
dc.type | Article | - |
dc.identifier.bibliographicCitation | Lee, 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.title | HYDROLOGICAL PROCESSES | - |
dc.citation.volume | 31 | - |
dc.citation.number | 20 | - |
dc.identifier.doi | 10.1002/hyp.11283 | - |
dc.citation.startPage | 3580 | - |
dc.citation.endPage | 3587 | - |
dc.description.articleClassification | SCI | - |
dc.description.jcrRate | JCR 2015:9.412 | - |
dc.subject.keyword | eddies | - |
dc.subject.keyword | immobile fluid zone | - |
dc.subject.keyword | rock fracture | - |
dc.subject.keyword | solute transport | - |
dc.subject.keyword | visualization technique | - |
dc.subject.keyword | Water Resources | - |
dc.identifier.localId | 2017-0226 | - |
dc.identifier.scopusid | 2-s2.0-85029811378 | - |
dc.identifier.wosid | 000410745000010 | - |
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