Study on the influence of voids on high-rise building on the wind environment

Abstract

The purpose of this study was to investigate the effects of voids in tall buildings on the surrounding wind environment. With the development of modular technology, there has been a new method of building high-rise buildings. Currently, more and more high-rise buildings often use void spaces to reduce the wind resistance and utilize wind turbines by using wind power to create sky gardens. In this study, CFD (computer fluid dynamic) technology was used to simulate the wind environment around the buildings. The research focuses on the size, distribution and quantity of the concavity, which usually is defined as sky gardens. It is found that when the area of the opening is the same, the more number of opening, the more strengthened and distributed vertical wind velocity behind the building can be. The wind shadow area at the pedestrian height is further reduced. For holes distribution, the optimum ratio of the spacing between concavities to the void size for wind environment of tall buildings ranges from 1 to 3, which can disperse the surrounding heat in more efficiency and weaken the wind velocity in the lowest level. Therefore, in high-rise buildings, the number and distribution of the openings will have different effects on the wind environment around the buildings.

Recent advances in modeling turbulent wind flow at pedestrian-level in the built environment

“…The RNG k-ε model incorporates contributions of the mean flow field's strain-rates to the production of TKE, and thus has more realistic predictions of TKE in separation regions. Good agreement with wind tunnel test results is obtained in several studies that focus on the airflow around isolated buildings using the RNG k-ε turbulence model (Bairagi & Dalui, 2021;Lee & Mak, 2022;Li & Chen, 2020;Liu, Wu, et al, 2020). Several other studies applied the RLZ k-ε turbulence model to simulate the airflows around isolated buildings (Chen & Mak, 2021;van Druenen et al, 2019;Weerasuriya et al, 2020;Zhang, Weerasuriya, et al, 2020).…”

The building plan automatic design optimization based on CFD numerical intelligent simulation

“…According to the statistics of residential area in Harbin of Renlong Zhang of Harbin Institute of Technology, 36 the placement of water was divided into three types: Centralized type, which means the water in the residential area was made up of a rather large water; Decentralized type, which means the water in the residential area was made up of two or more waters; Edge flow type, which means the water in the residential area was banded and located at one edge of the residential area, which formed the water configuration there. In this study, building layouts under three different types of water configurations were evaluated.…”

The potential of a retractable roof of the natatorium on the indoor environmental improvement: Taking Jiading natatorium of Tongji University as an example

“…According to previous studies on the open–closed roof of natatoriums, 4,13,23–25 the application of open–closed roof technology in hot summer and cold winter areas can well regulate the thermal and humidity environment of natatoriums and the use of air conditioning equipment can be reduced by natural ventilation, achieving the purpose of saving energy. 26 How to better apply the open–closed roof technology, maximize the effect of the open–closed roof technology and integrate the open–closed roof with architectural art is the main purpose of this study.…”

“…[20][21][22] According to previous studies on the open-closed roof of natatoriums, 4,13,[23][24][25] the application of open-closed roof technology in hot summer and cold winter areas can well regulate the thermal and humidity environment of natatoriums and the use of air conditioning equipment can be reduced by natural ventilation, achieving the purpose of saving energy. 26…”