90도 모서리와 충돌하는 와류고리의 격자볼츠만 시뮬레이션
- Title
- 90도 모서리와 충돌하는 와류고리의 격자볼츠만 시뮬레이션
- Other Titles
- Lattice Boltzmann Simulations of Vortex Ring Impinging on 90 Degrees Edge
- Author
- 이상환
- Keywords
- Vortex ring (와류고리); Lattice Boltzmann method (격자볼츠만법); Vortex reconnection (와류재연결); Vortex structure (와류구조)
- Issue Date
- 2021-10
- Publisher
- 한국유체기계학회
- Citation
- 한국유체기계학회 논문집, v. 24, NO. 5, Page. 58-67
- Abstract
- We investigate a vortex rings impinging on a 90 degrees edge by using a numerical method. To obtain the flow fields, we use a lattice Boltzmann method with multi relaxation times that is more stable than single relaxation time scheme. From the numerical simulations, the effects on the vortex structures are studied with different distances between the 90 degrees edge and the vortex ring axis. We focus on a fixed Reynolds number of 2100 and an incidence angle of 45 degrees. Our results show that when the ring axis and the edge lie on the same line, the vortex ring is separated into the same two parts. The two vortices induce complicated and vague vortex structures near the walls. On the other hands, secondary vortex rings are formed as the distance increases. Small-scaled vortices are generated around the primary vortices, and then the small vortices play an important role to form the secondary vortex rings. However, the shape of secondary vortex are dependent on where the small vortices are generated. Consequently, the secondary vortex rings show different aspect ratios for the distances.
- URI
- https://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE10610856&language=ko_KR&hasTopBanner=truehttps://repository.hanyang.ac.kr/handle/20.500.11754/177732
- ISSN
- 2287-9706
- DOI
- 10.5293/kfma.2021.24.5.058
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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