Wind and Structures

Techno-Press (테크노프레스)
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Systematic influence of wind incident directions on wind circulation in the re-entrant corners of high-rise buildings

  • Qureshi, M. Zahid Iqbal (Department of Architecture and Civil Engineering, College of Science and Engineering, City University of Hong Kong) ;
  • Chan, A.L.S. (Division of Building Science and Technology, College of Science and Engineering, City University of Hong Kong)
  • Received : 2015.12.03
  • Accepted : 2016.02.21
  • Published : 2016.04.25
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Abstract

The mechanical and aerodynamic effect of building shape plays a dominate role in the pedestrian level wind environment. These effects have been presented in numerous studies and are available in many wind codes. However, most studies have focused on wind flow around conventional buildings and are limited to few wind directions. The present study investigated wind circulation in the re-entrant corners of cross-shaped high-rise buildings from various wind directions. The investigation focused on the pedestrian level wind environment in the re-entrant corners with different aspect ratios of building arrangements. Ninety cases of case study arrangements were evaluated using wind tunnel experimentation. The results show that for adequate wind circulation in the re-entrant corners, building orientations and separations play a critical role. Furthermore, in normal wind incident directions and at a high aspect ratio, poor wind flow was observed in the re-entrant corners. Moreover, it was noted that an optimized building orientation and aspect ratio significantly improved the wind flow in re-entrant corners and through passages. In addition, it was observed that oblique wind incident direction increased wind circulation in the re-entrant corners and through passages.

Keywords

Acknowledgement

Supported by : City University of Hong Kong

References

  1. Afiq W.M.Y., Azwadi C.S.N. and Saqr, K.M. (2012), "Effects of buildings aspect ratio, wind speed and wind direcion on flow structure and pollutant dispersion in symmetric street canyons: A review", Int. J. Mech. Mater. Eng., 7(2),158-165.
  2. Blocken, B. andCarmeliet, J. (2004), "Pedestrian wind environment around buildings: Literature review and practical examples", J. Build.Phys., 28(2),107-159. https://doi.org/10.1177/1097196304044396
  3. Blocken, B. and Stathopoulos, T. (2013), "CFD simulation of pedestrian-level wind conditions around buildings: Past achievements and prospects", J. Wind Eng. Ind. Aerod., 121, 138-145. https://doi.org/10.1016/j.jweia.2013.08.008
  4. Blocken, B. (2014), "50 years of computational wind engineering: Past, present and future", J. Wind Eng. Ind. Aerod., 129, 69-102. Retrieved November 3, 2014. https://doi.org/10.1016/j.jweia.2014.03.008
  5. Blocken, B. (2015), "Computational fluid dynamics for urban physics: Importance, scales, possibilities, limitations and ten tips and tricks towards accurate and reliable simulations", Build. Environ., 91, 219-245. https://doi.org/10.1016/j.buildenv.2015.02.015
  6. Cheng, C.K.C., Lam, K.M., Leung, Y.T.A., Yang, K., Danny, H.W.L. and Sherman, C.P.C. (2011), "Wind-induced natural ventilation of re-entrant bays in a high-rise building", J. Wind Eng. Ind. Aerod., 99(2-3),79-90. https://doi.org/10.1016/j.jweia.2010.11.002
  7. Chow, T.T., Lin, Z. and Liu, J.P. (2002), "Effect of condensing unit layout at building re-entrant on split-type air-conditioner performance", Architect. Sci. Rev., 45(1), 3-11. https://doi.org/10.1080/00038628.2002.9696930
  8. Franke, J., Antti Hellsten, H.S. and Bertrand, C. (2007), Best Practice Guideline for the CFD Simulation of Flows in the Urban Environment.
  9. Gao, N.P., Niu, J.L., Perino, M. and Heiselberg., P. (2009), "The airborne transmission of infection between flats in high-rise residential buildings: Tracer gas simulation", Build. Environmen, 44, 402-410. https://doi.org/10.1016/j.buildenv.2008.03.016
  10. Gomes, M.G., Rodrigues, A.M. and Mendes, P. (2005), "Experimental and numerical study of wind pressures on irregular-plan shapes", J. Wind Eng. Ind. Aerod., 93(10), 741-756. https://doi.org/10.1016/j.jweia.2005.08.008
  11. Hang, J., Li, Y., Sandberg, M., Buccolieri, R. and Sabatino, S.D. (2012), "The influence of building height variability on pollutant dispersion and pedestrian ventilation in idealized high-rise urban areas", Build. Environ., 56, 346-360. https://doi.org/10.1016/j.buildenv.2012.03.023
  12. Higson, H.L., Griffiths, R.F., Jones, C.D. and Hall, D.J. (1996), "Flow and dispersion around an isolated building", Atmosph. Environ., 30(16), 2859-2870. https://doi.org/10.1016/1352-2310(95)00313-4
  13. Janssen, W.D., Blocken, B. and van Hooff, T. (2013), "Pedestrian wind comfort around buildings: Comparison of wind comfort criteria based on whole-flow field data for a complex case study", Build. Environment, 59, 547-562. https://doi.org/10.1016/j.buildenv.2012.10.012
  14. Kubota, T., Miura, M., Tominaga, Y. and Mochida, A. (2008), "Wind tunnel tests on the relationship between building density and pedestrian-level wind velocity: Development of guidelines for realizing acceptable wind environment in residential neighborhoods", Build. Environ., 43(10), 1699-1708. https://doi.org/10.1016/j.buildenv.2007.10.015
  15. Ng, E. (2009), "Policies and technical guidelines for urban planning of high-density cities-Air Ventilation Assessment (AVA) of Hong Kong", Build. Environ., 44(7), 1478-1488. https://doi.org/10.1016/j.buildenv.2008.06.013
  16. Santos, J.M., Griffiths, R.F., Roberts, I.D. and Reis, N.C. (2005), "A field experiment on turbulent concentration fluctuations of an atmospheric tracer gas in the vicinity of a complex-shaped building", Atmos. Environ., 39(28), 4999-5012. https://doi.org/10.1016/j.atmosenv.2005.05.005
  17. Snyder, W.H. (1972), "Similarity criteria for the application of fluid models to the study of air pollution meteorology", Bound.-Lay. Meteorol., 3, 113-134. https://doi.org/10.1007/BF00769111
  18. Stathopoulos, T., Wu, H. and Bedard, C. (1992), "Wind environment around buildings: A knowledge-based approach", J. Wind Eng. Ind. Aerod., 44(1-3), 2377-2388. https://doi.org/10.1016/0167-6105(92)90028-9
  19. Stathopoulos, T. (2006), "Pedestrian level winds and outdoor human comfort", J. Wind Eng. Ind. Aerod., 94(11), 769-780. https://doi.org/10.1016/j.jweia.2006.06.011
  20. Tominaga, Y., Mochida, A., Yoshie, R., Kataoka, H., Nozu, T., Yoshikawa, M. and Shirasawa, T. (2008), "AIJ guidelines for practical applications of CFD to pedestrian wind environment around buildings", J. Wind Eng. Ind. Aerod., 96(10-11), 1749-1761. https://doi.org/10.1016/j.jweia.2008.02.058
  21. Tsang, C.W., Kwok, K.C.S. and Hitchcock, P.A. (2012), "Wind tunnel study of pedestrian level wind environment around tall buildings: Effects of building dimensions, separation and podium", Build. Environ., 49, 167-181. https://doi.org/10.1016/j.buildenv.2011.08.014
  22. Wang, Y., Zhou, Y. Zhu, Y. and Tse Tim, K.T. (2012), "Numerical prediction of wind flow around irregular models", J. Fluids Eng., 134(7), 071108. https://doi.org/10.1115/1.4006225
  23. Wong, S.Y. and Lam, K.M. (2013), "Effect of recessed cavities on wind-induced loading and dynamic responses of a tall building", J. Wind Eng. Ind. Aerod., 114, 72-82. https://doi.org/10.1016/j.jweia.2012.12.013
  24. Yang, F., Kang, Y., Gao, Y. and Zhong, K. (2015), "Numerical simulations of the effect of outdoor pollutants on indoor air quality of buildings next to a street canyon", Build. Environ., 87, 10-22. https://doi.org/10.1016/j.buildenv.2015.01.008
  25. Yeung, K.H., and Yu, I.T.S. (2007), "Possible meteorological influence on the Severe Acute Respiratory Syndrome (SARS) community outbreak at amoy gardens,Hong Kong", J. Environ. Health, 70(3), 39-46.
  26. Zhang, Y., Kwok, K.C.S., Liu, X.P. and Niu, J.L. (2015), "Characteristics of air pollutant dispersion around a high-rise building", Environmental pollution (Barking, Essex : 1987), 204, 280-288. https://doi.org/10.1016/j.envpol.2015.05.004