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DC Field | Value | Language |
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dc.citation.endPage | 104 | - |
dc.citation.startPage | 90 | - |
dc.citation.title | INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW | - |
dc.citation.volume | 65 | - |
dc.contributor.author | Jeong, Young Dal | - |
dc.contributor.author | Lee, Jae Hwa | - |
dc.date.accessioned | 2023-12-21T22:12:25Z | - |
dc.date.available | 2023-12-21T22:12:25Z | - |
dc.date.created | 2017-04-26 | - |
dc.date.issued | 2017-06 | - |
dc.description.abstract | Numerical simulations using an improved version of the immersed boundary method are performed to explore a passive control concept for a single flexible flag in a viscous uniform flow. In order to control a single flag passively, we utilize the distinct dynamics of two side-by-side flags, characterized by in-phase and out-of-phase flapping modes depending on their spanwise gap distance. When the two side-by-side flags are in an in-phase flapping mode with a small spanwise gap distance, the flapping amplitude of a single downstream flag is highly enhanced due to synchronization between the vortices shed from the upstream and downstream flags. However, when the two upstream flags flap in an out-of-phase flapping mode with a large spanwise gap distance, the flapping of the single flag is significantly weakened with a reduction of the dominant flapping frequency. Because the upstream flags induce consecutive counter-rotating vortex pairs with a high frequency due to their flapping mode (out-of-phase state), relatively strong interaction with an upcoming vortex of the opposite rotational direction leads to flapping inhibition of the single flag. For an intermediate spanwise gap distance, the vortex-to-vortex interaction between the flags becomes more complicated, and a change of the flapping phases of the two side-by-side flags depending on streamwise gap distance between the upstream and downstream flags occurs. The interactions between coupled flags are documented through the root-mean-square cross-stream tail positions, frequency, drag coefficient, vorticity and pressure contours of the flags with varying non-dimensional parameters relevant to the problem. The proposed passive control concept of a single flag using two side-by-side flags is applicable to the development of energy harvesting systems to extract more energy and flapping control systems to suppress vibration. | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, v.65, pp.90 - 104 | - |
dc.identifier.doi | 10.1016/j.ijheatfluidflow.2017.04.003 | - |
dc.identifier.issn | 0142-727X | - |
dc.identifier.scopusid | 2-s2.0-85017410937 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/21885 | - |
dc.identifier.url | http://www.sciencedirect.com/science/article/pii/S0142727X16306683 | - |
dc.identifier.wosid | 000403511700007 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE INC | - |
dc.title | Passive control of a single flexible flag using two side-by-side flags | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Thermodynamics; Engineering, Mechanical; Mechanics | - |
dc.relation.journalResearchArea | Thermodynamics; Engineering; Mechanics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Fluid-structure interaction | - |
dc.subject.keywordAuthor | Energy harvesting | - |
dc.subject.keywordAuthor | Vibration control | - |
dc.subject.keywordAuthor | Immersed boundary method | - |
dc.subject.keywordAuthor | Numerical simulation | - |
dc.subject.keywordPlus | FLOWING SOAP FILM | - |
dc.subject.keywordPlus | IMMERSED BOUNDARY METHOD | - |
dc.subject.keywordPlus | UNIFORM-FLOW | - |
dc.subject.keywordPlus | CIRCULAR-CYLINDERS | - |
dc.subject.keywordPlus | FLAPPING FILAMENTS | - |
dc.subject.keywordPlus | INDUCED VIBRATION | - |
dc.subject.keywordPlus | INTERACTION MODES | - |
dc.subject.keywordPlus | ACTIVE CONTROL | - |
dc.subject.keywordPlus | DYNAMICS | - |
dc.subject.keywordPlus | PLATES | - |
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