Oxygen Transfer and Energy Dissipation by Nappe and Skimming Flow over Stepped Weir Structure
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Jin-Hong | - |
dc.contributor.author | Kim, Sun-Jung | - |
dc.contributor.author | Li, Min-Jee | - |
dc.date.accessioned | 2021-11-18T00:40:17Z | - |
dc.date.available | 2021-11-18T00:40:17Z | - |
dc.date.issued | 2016 | - |
dc.identifier.issn | 2352-538X | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/51588 | - |
dc.description.abstract | Oxygen transfer and the energy dissipation by the flow types at the stepped weir structure were performed through hydraulic experiments. Nappe flow occurs at low flow rates and for relatively small step slope. Dominant features of an air pocket, nappe impact and subsequent hydraulic jump occurs. At larger flow rates, skimming flow occurs with formation of recirculating vortices. Transition flow showed simultaneous occurrence of skimming flow at upper steps and nappe flow at lower steps. Air entrainment occurs through free-falling nappe impact and subsequent hydraulic jump in the nappe flow, and occurs from the step edges in the skimming flow. Energy dissipation occurs through the jet impact and the subsequent hydraulic jump in the nappe flow and occurs through maintaining the recirculation vortices between step edges in the skimming flow regimes. The average values of the oxygen transfer are 0.45 in the nappe flow and 0.28 in the skimming flow, and the efficiencies of energy dissipation in the nappe flow and in the skimming flow are about 70 similar to 95(%) and 60 similar to 90(%), respectively. From these results, the stepped weir structure is found to be efficient for oxygen transfer and for energy dissipation. | - |
dc.format.extent | 5 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | ATLANTIS PRESS | - |
dc.title | Oxygen Transfer and Energy Dissipation by Nappe and Skimming Flow over Stepped Weir Structure | - |
dc.type | Article | - |
dc.identifier.bibliographicCitation | PROCEEDINGS OF THE 2016 INTERNATIONAL CONFERENCE ON EDUCATION, MANAGEMENT, COMPUTER AND SOCIETY, v.37, pp 1691 - 1695 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000388458100423 | - |
dc.citation.endPage | 1695 | - |
dc.citation.startPage | 1691 | - |
dc.citation.title | PROCEEDINGS OF THE 2016 INTERNATIONAL CONFERENCE ON EDUCATION, MANAGEMENT, COMPUTER AND SOCIETY | - |
dc.citation.volume | 37 | - |
dc.type.docType | Proceedings Paper | - |
dc.subject.keywordAuthor | Oxygen transfer | - |
dc.subject.keywordAuthor | Energy dissipation | - |
dc.subject.keywordAuthor | Nappe flow | - |
dc.subject.keywordAuthor | Skimming flow | - |
dc.subject.keywordAuthor | Stepped weir | - |
dc.subject.keywordPlus | SELF-AERATED FLOWS | - |
dc.subject.keywordPlus | CHUTES | - |
dc.relation.journalResearchArea | Computer Science | - |
dc.relation.journalResearchArea | Operations Research & Management Science | - |
dc.relation.journalWebOfScienceCategory | Computer Science, Interdisciplinary Applications | - |
dc.relation.journalWebOfScienceCategory | Operations Research & Management Science | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
84, Heukseok-ro, Dongjak-gu, Seoul, Republic of Korea (06974)02-820-6194
COPYRIGHT 2019 Chung-Ang University All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.