DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Daegyoum | - |
dc.contributor.advisor | 김대겸 | - |
dc.contributor.author | Jang, Changhwan | - |
dc.date.accessioned | 2023-06-21T19:31:58Z | - |
dc.date.available | 2023-06-21T19:31:58Z | - |
dc.date.issued | 2023 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1032241&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/307696 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 기계공학과, 2023.2,[iii, 18 p. :] | - |
dc.description.abstract | A cavitation bubble collapsing near a boundary causes a liquid jet because of the asymmetric pressure distribution near the bubble. The characteristics of a liquid jet induced by a collapsing bubble depends on the boundary near the bubble. Previously, a study confirmed that the liquid jet near the Gas Entrapping Microtextured Surface(GEMS) is directed away from a solid surface. In this study, we numerically investigate the mitigation of the pressure on a solid surface with a single circular-cylindrical-shape air pocket by varying the geometric parameters, such as a pocket radius and a depth. The simulation is conducted on the open source software OpenFOAM with PISO algorithm. The interaction of a bubble and an air pocket is analysed by dividing the process into the bubble expansion stage, bubble contraction stage, secondary bubble expansion stage. In most cases, the bubble jet is directed away from the air pocket. Moreover, the maximum pressure on the boundary decreases contrary to the solid surface without an air pocket. These results are explained successfully by the interaction of the cavitation bubble with the air pocket. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Cavitation bubble▼aGas pocket▼aWall pressure mitigation▼aBubble jet | - |
dc.subject | 공동 현상▼a기체 포켓▼a벽면 압력 완화▼a버블 제트 | - |
dc.title | Cushioning effect of a gas pocket on bubble jet mitigation near solid | - |
dc.title.alternative | 고체 근처 버블 제트 완화를 위한 기체 포켓의 완충 효과 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :기계공학과, | - |
dc.contributor.alternativeauthor | 장창환 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.