Wind and Structures

  • 제19권6호
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  • Pages.585-601
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  • 2014
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Numerical evaluation of the effect of multiple roughness changes

  • Abdi, Daniel S. (Department of Civil and Environmental Engineering, University of Western Ontario) ;
  • Bitsuamlak, Girma T. (Department of Civil and Environmental Engineering, University of Western Ontario)
  • 투고 : 2013.07.26
  • 심사 : 2014.03.31
  • 발행 : 2014.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

The effect of multiple roughness changes close to a building site was examined through three dimensional computational fluid dynamics (CFD) simulations conducted in a virtual boundary layer wind tunnel (V-BLWT). The results obtained were compared with existing wind speed models, namely ESDU-82026 and Wang and Stathopoulos (WS) model. The latter was verified by wind tunnel tests of sixty nine cases of multiple roughness patches, and also with a simplified 2D numerical model. This work extends that numerical study to three dimensions and also models roughness elements explicitly. The current numerical study shows better agreement with the WS model, that has shown better agreements with BLWT tests, than the ESDU model. This is in contrast to previous results of Wang and Stathopoulos, who concluded that CFD shows better agreement with the ESDU model. Many cases were simulated in a V-BLWT that has same dimensions as BLWT used in the original experiment and also in a reduced symmetrical version (S-BLWT) that takes advantage of regular arrangement of roughness blocks. The S-BLWT gives results almost identical to V-BLWT simulations, while achieving significant reduction on computational time and resources.

키워드

참고문헌

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피인용 문헌

  1. Asynchronous Parallelization of a CFD Solver vol.2015, 2015, https://doi.org/10.1155/2015/295393
  2. Wind Turbine Loads Induced by Terrain and Wakes: An Experimental Study through Vibration Analysis and Computational Fluid Dynamics vol.10, pp.11, 2017, https://doi.org/10.3390/en10111839
  3. Wind flow simulations in idealized and real built environments with models of various level of complexity vol.22, pp.4, 2016, https://doi.org/10.12989/was.2016.22.4.503
  4. Assessing methods to extrapolate the vertical wind-speed profile from surface observations in a city centre during strong winds vol.173, 2018, https://doi.org/10.1016/j.jweia.2017.09.007
  5. Wind flow simulations on idealized and real complex terrain using various turbulence models vol.75, 2014, https://doi.org/10.1016/j.advengsoft.2014.05.002
  6. Wind Loading of Structures: Framework, Phenomena, Tools and Codification vol.12, 2017, https://doi.org/10.1016/j.istruc.2017.09.008
  7. LES of ABL flow in the built-environment using roughness modeled by fractal surfaces vol.19, 2015, https://doi.org/10.1016/j.scs.2015.07.003