Mean Reattachment Length of Roof Separation Bubbles Using Proper Orthogonal Decomposition
Source abstract
Abstract
Investigating flow separation regions on the surfaces of three-dimensional bluff bodies in turbulent flows is important because these regions can induce significant aerodynamic loads. Separation bubbles can generate extreme pressures, making the roof components of low-rise buildings vulnerable. In this study, proper orthogonal decomposition (POD) was applied to wind-induced roof pressures to elucidate the physical significance of the dominant modes. Based on the interpretation of the first mode from the POD, the mean reattachment length of the roof separation bubbles on a low-rise building model in turbulent flow was determined. The mean reattachment length derived from the POD was then compared with the length obtained from an aerodynamic database. For the centerline of the roof, the mean reattachment length based on the POD aligned well with that from the aerodynamic database, showing a difference of less than 5%. This study highlights the efficacy of POD as a powerful tool for estimating the reattachment length of separation bubbles on bluff bodies.
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Research context
OpenAlex topics: Wind and Air Flow Studies · Fluid Dynamics and Vibration Analysis · Fluid Dynamics and Turbulent Flows
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Division of Architectural, Civil and Environmental Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
School of Civil Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
Institute of Industrial Technology, Kangwon National University, Chuncheon 24341, Republic of Korea
Department of Architecture, Dankook University, Yongin 16890, Republic of Korea
Funding
Ministry of Interior and Safety (MOIS, Korea)
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