An Analysis of Elevated Building Design on Building Surrounded Outdoor Wind Environment
Jiawei Zhang ( School of Architecture, Soochow University, Suzhou 215123, Jiangsu, China )
Zhen Tian ( School of Architecture, Hunan University, Changsha 410082, Hunan, China )
https://doi.org/10.37155/2811-0730-0101-3Abstract
Building elevated design is one of the methods that may improve the outdoor wind environment. Integrating computational fluid dynamics (CFD) simulation into an architectural design can provide an informed decision for architectural design. In this study, CFD simulation was used to explore elevated design impacts on a case study building wind environment at the building’s pedestrian height. Simulation results from two CFD programs were compared and both showed that the elevated design of the case study building had a good effect on improving the wind environment at the pedestrian height of 1.5 m. The elevated design can increase the wind speed of the 1.5 m pedestrian height in the building’s windward area when the elevated height is 2.4~3.0 m. When the elevated design height is above 3.0 m, the elevated design has little impact on the 1.5 m height wind speed at the building’s windward area. Taking the case study building as a prototype, the impact of various building heights and elevated widths on the pedestrian height outdoor wind speeds were explored. Results show that when the building height is between 24 and 72 m, increasing the building height can increase the wind speeds of at pedestrian height in the high wind speed area of the windward area, but may gradually reduce the wind speed at the pedestrian height in the low wind speed area of the windward area around the building. When the total height of the building and the elevated height is unchanged, results show that increasing the elevated width of the building can increase the pedestrian height wind speeds in the high wind speed area of the windward area and has no significant impacts on the pedestrian height wind field distribution in the low wind speed area of the windward area.
Keywords
Building elevated design; Elevated height; Elevated width; Outdoor wind environment; CFD simulationFull Text
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[2] Liu J, Niu J, Ming Mak C, Xia Q, Detached eddy simulation of pedestrian-level wind and gust around an elevated building, Build. Environ. 2017, 125: 168-179, https://doi.org/10.1016/j.buildenv.2017.08.031.
[3] Stathopoulos T, Wu H, Bédard C, Wind environment around buildings: A knowledge-based approach, J. Wind Eng. Ind. Aerodyn. 1992, 44(01-03): 2377-2388, https://doi.org/10.1016/0167-6105(92)90028-9.
[4] Xia Q, Liu X, Niu J, Kwok K.C.S, Effects of building lift-up design on the wind environment for pedestrians, Indoor and Built Environment, 2017, 26(09): 1214-1231, https://doi.org/10.1177/1420326X15609967.
[5] Niu J, Liu J, Lee Tsz-Cheung, Lin Z, Mak C, Tse K.T, Tang B, Kwok K.C.S, A new method to assess spatial variations of outdoor thermal comfort: Onsite reference results and implications for precinct planning, Build. Environ. 2015, 91(0): 263-270, https://doi.org/10.1016/j.buildenv.2015.02.017.
[6] Liu J, Zhang X, Niu J, Tse K.T., Pedestrian-level wind and gust around buildings with a lift-up design: Assessment of influence from surrounding buildings by adopting LES, Build. Simul. 2019, 12(06): 1107-1118, https://doi.org/10.1007/s12273-019-0541-5.
[7] Liu J, Niu J, Xia Q, Combining measured thermal parameters and simulated wind velocity to predict outdoor thermal comfort, Build. Environ. 2016, 105: 185-197. https://doi.org/10.1016/j.buildenv.2016.05.038.
[8] Tse K.T., Zhang X, Weerasuriya A.U., Li S.W., Kwok K.C.S., Ming Mak C, Niu J, Adopting ‘lift-up’ building design to improve the surrounding pedestrian-level wind environment, Build. Environ. 2017, 117: 154-165, https://doi.org/10.1016/j.buildenv.2017.03.011.
[9] Fanger, P.O. Thermal comfort: Analysis and applications in environmental engineering, Danish Technical Press, Copenhagen, Denmark, 1970, 244 pp.: Abstr. in World Textile Abstracts. 1972, 3(03), https://doi.org/10.1016/S0003-6870(72)80074-7.
[10] Zhang H, Arens E, Huizenga C, Han T, Thermal sensation and comfort models for non-uniform and transient environments, part II: Local comfort of individual body parts, Build. Environ. 2010, 45(02): 399-410, https://doi.org/10.1016/j.buildenv.2009.06.020.
[11] Fang Z, Feng X, Liu J, Lin Z, Ming Mak C, Niu J, Tse K.T., Xu X, Investigation into the differences among several outdoor thermal comfort indices against field survey in subtropics, Sustainable Cities and Society, 2019, 44: 676-690, https://doi.org/10.1016/j.scs.2018.10.022.
[12] Xie Y, Huang T, Li J, Liu J, Niu J, Ming Mak C, Lin Z, Evaluation of a multi-nodal thermal regulation model for assessment of outdoor thermal comfort: Sensitivity to wind speed and solar radiation, Build. Environ. 2018,132: 45-56, https://doi.org/10.1016/j.buildenv.2018.01.025.
[13] Yoshine R, Mochida A, Tominaga Y, Kataoka H, Harimoto K, Nozu T, Shirasawa T, Cooperative project for CFD prediction of pedestrian wind environment in the Architectural Institute of Japan, Journal of Wind Engineering & Industrial Aerodynamics, 2007, 95(09): 1551-1578, https://doi.org/10.1016/j.jweia.2007.02.023.
[14] Janssen W.D., Blocken B, Van Hooff T, Pedestrian wind comfort around buildings: Comparison of wind comfort criteria based on whole-flow field data for a complex case study, 2013, 59: 547-562, https://doi.org/10.1016/j.buildenv.2012.10.012.
[15] Ding Y, Wang Q, ANSYS ICEM CFD: From beginners to masters, Tsinghua University Press, 2013.
[16] Yang J, Wang Z, Tian Z, Comparative study on ventilation effect of high-rise residential buildings based on CFD simulation: A case study of Sui Wo Court in Hongkong, Journal of Suzhou University of Science and Technology (Engineering and Technology), 2018, 31(03): 57-62.
[17] GBSWARE. Vent user manual, Beijing GBSWARE company, 2016.
[18] Ministry of Housing and Urban-Rural Development of the People’s Republic of China. JGJ/T 309-2013, Building ventilation effective test and evaluation standard. Beijing: China Construction Industry Press, 2013.
[19] Liu J, Niu J, CFD simulation of the wind environment around an isolated high-rise building: An evaluation of SRANS, LES and DES models, 2016, 96: 91-106, https://doi.org/10.1016/j.buildenv.2015.11.007.
[20] Hooff T, Blocken B Tominaga Y, On the accuracy of CFD simulation of cross-ventilation flows for a generic isolated building: Comparison of RANS, LES and experiments, Build. Environ. 2017, 114: 148-165, https://doi.org/10.1016/j.buildenv.2016.12.019.
[21] Blocken B, LES over RANS in building simulation for outdoor and indoor applications: A foregone conclusion? Build. Simul. 2018, 11: 821-870, https://doi.org/10.1007/s12273-018-0459-3.
[22] Tominaga Y, Stathopoulos T, Numerical simulation of dispersion around an isolated cubic building: comparison of various types of Models, Atmos. Environ. 2009, 43: 3200-3210, https://doi.org/10.1016/j.atmosenv.2009.03.038.
[23] Franke J, Hellsten A, Schlunzen H, Carissimo B, Best practice guideline for the CFD simulation of flows in the urban environment, COST Action 732: Quality assurance and improvement of microscale meteorological models. COST Office Brussels, 2007, 1-52, ISSN: 09574352.
[24] China Engineering Construction Standardization Association. GB 50009-2012, Building structure load code[S]. Beijing: China Construction Industry Press, 2012.
[25] Ministry of Housing and Urban-Rural Development of the People’s Republic of China. GB 50736-2012, Design Code for Heating Ventilation and Air Conditioning of Civil Buildings[S]. Beijing: China Construction Industry Press, 2012.
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