Wind and Structures

  • 제23권6호
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  • Pages.523-542
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  • 2016
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

CFD-DEM modeling of snowdrifts on stepped flat roofs

  • Zhao, Lei (School of Civil Engineering, Southwest Jiaotong University) ;
  • Yu, Zhixiang (School of Civil Engineering, Southwest Jiaotong University) ;
  • Zhu, Fu (School of Civil Engineering, Southwest Jiaotong University) ;
  • Qi, Xin (School of Civil Engineering, Southwest Jiaotong University) ;
  • Zhao, Shichun (School of Civil Engineering, Southwest Jiaotong University)
  • 투고 : 2016.06.01
  • 심사 : 2016.09.25
  • 발행 : 2016.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Snowdrift formation on roofs should be considered in snowy and windy areas to ensure the safety of buildings. Presently, the prediction of snowdrifts on roofs relies heavily on field measurements, wind tunnel tests and numerical simulations. In this paper, a new snowdrift modeling method by using CFD (Computational Fluid Dynamics) coupled with DEM (Discrete Element Method) is presented, including material parameters and particle size, collision parameters, particle numbers and input modes, boundary conditions of CFD, simulation time and inlet velocity, and coupling calculation process. Not only is the two-way coupling between wind and snow particles which includes the transient changes in snow surface topography, but also the cohesion and collision between snow particles are taken into account. The numerical method is applied to simulate the snowdrift on a typical stepped flat roof. The feasibility of using coupled CFD with DEM to study snowdrift is verified by comparing the simulation results with field measurement results on the snow depth distribution of the lower roof.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, State Key Laboratory of Geohazard Prevention and Geoenvironment

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피인용 문헌

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  4. INVESTIGATION OF REPRODUCTION OF SNOW DISTRIBUTION ON A TWO-LEVEL FLAT-ROOF BUILDING : Prediction of unbalanced snow distribution due to wind on roofs using CFD vol.84, pp.762, 2016, https://doi.org/10.3130/aijs.84.1055
  5. Wind Tunnel Tests and Numerical Simulations of Wind-Induced Snow Drift in an Open Stadium and Gymnasium vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/8840759
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  7. CFD simulations can be adequate for the evaluation of snow effects on structures vol.13, pp.4, 2016, https://doi.org/10.1007/s12273-020-0643-0
  8. Wind Tunnel Test of Wind Load on a Typical Cross Line High-Speed Railway Station vol.25, pp.10, 2016, https://doi.org/10.1007/s12205-021-0702-9