DDES analysis of wind-induced interference effect on three prisms aligned in parallel
Received:September 03, 2020  Revised:December 27, 2020
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DOI:10.7511/jslx20200903001
KeyWord:three prisms aligned in parallel  interference effect  delayed detached eddy simulation  wind load  turbulence model
        
AuthorInstitution
张爱社 山东建筑大学 土木工程学院, 济南
高翠兰 山东建筑大学 交通工程学院, 济南
王元雷 山东省建筑设计研究院有限公司第八分院, 济南
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Abstract:
      The numerical simulation for wind loads and wind fields of three prisms sitting side by side in line is employed based on the shear stress transport k-ω(SST k-ω) model and the delayed detached-eddy simulation(DDES).Firstly,three-dimensional flows around a single square cylinder are simulated.The time-averaged results are compared between numerical and experimental data,which shows good agreement.The DDES method is verified by comparing the computational results with the experimental results for turbulent flows around a cylinder.The numerical analysis of separation ratio effects is carried out for the interference along and across wind directions,respectively,among three square prisms aligned in parallel at equal space.The computational results indicate that the separation ratio among the prisms has a significant interfering effect on the wind load distribution on the central building.Generally,when the separation ratio is 3.0,the interference effect on the central cylinder is up to the maximum value.The interfering mechanism among the buildings is discussed preliminarily.The present results indicate that the current implementation of SST-DDES method is able to simulate turbulent flows with separation for high Reynolds numbers.The results of the paper are useful for the research of wind-induced interference effects on the tall buildings.