개선된 PANS 난류 모델을 이용한 높은 레이놀즈 수를 갖는 실린더 주위 난류 유동에 대한 수치 모사COMPUTATIONAL SIMULATION OF TURBULENT FLOWS AROUND A CIRCULAR CYLINDER AT HIGH REYNOLDS NUMBERS USING AN IMPROVED PANS MODEL
- Other Titles
- COMPUTATIONAL SIMULATION OF TURBULENT FLOWS AROUND A CIRCULAR CYLINDER AT HIGH REYNOLDS NUMBERS USING AN IMPROVED PANS MODEL
- Authors
- 강민재; 정재환; 석우찬; 조석규; 이상봉
- Issue Date
- 2020
- Publisher
- 한국전산유체공학회
- Keywords
- 원형 실린더(Circular Cylinder); 임계 영역(Critical Regime); 하이브리드 PANS(hybridPANS); 오픈폼(OpenFOAM); 항력 계수(Drag Coefficient); 스트롤 수(Strouhal Number)
- Citation
- 한국전산유체공학회지, v.25, no.3, pp 113 - 122
- Pages
- 10
- Journal Title
- 한국전산유체공학회지
- Volume
- 25
- Number
- 3
- Start Page
- 113
- End Page
- 122
- URI
- https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/256
- ISSN
- 1598-6071
- Abstract
- Computational simulations of turbulent flows around a circular cylinder were performed to investigate the drag coefficient and Strouhal number at sub-critical and critical Reynolds numbers. Unstructured grids with 3.1 million cells including prism layers were used in the present study. Both RANS and PANS simulations using k-ω SST model failed to predict a transitional behavior of drag coefficient and vortex shedding frequency at sub-critical and critical Reynolds numbers due to the absence of laminar separation bubble. But a hybrid combination of unresolved turbulence viscosity in PANS and sub-grid scale turbulence viscosity in LES provided a good agreement of drag coefficient and vortex shedding frequency with previous results.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 친환경해양개발연구본부 > 심해공학연구센터 > Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.