Large eddy simulation of wind pressure distribution on heterogeneous buildings in idealised urban models

Ahmad Faiz Mohammad, Sheikh Ahmad Zaki, Mohamed Sukri Mat Ali, Hagishima Aya, Azli Abdul Razak, Masataka Shirakashi, Norio Arai

Research output: Contribution to journalConference article

7 Citations (Scopus)

Abstract

In a typical urban area where buildings are built in a cluster with random spacing, the distribution of the wind pressure on a building is influenced by interference effects from neighbouring buildings, which could ultimately affect the wind-induced ventilation across the building. Large-eddy simulations (LESs) were conducted for six cases of staggered random arrays with various packing densities (λp). In addition, the heterogeneity of a typical urban surface was represented by buildings of different heights. Each type of building had a different aspect ratio αP (the ratio of the front area to the planar area of the building), which ranged between 0.84 (low-rise building) and 3.76 (high-rise building). The LES results showed that high-rise buildings (i.e. aP > 3.0) were less obstructed from the approaching flow because they had higher aspect ratios than the low-rise buildings (i.e. aP < 2.64). This was also because of their positions immediately behind the low-rise buildings. In dense arrays (i.e. lP > 0.250), the pressure drag was dominated by high-rise buildings by up to 55%. These findings will be beneficial in a study of the mean pressure distribution of clustered buildings. Although the results of this study were exclusive to random staggered arrays, they are an important addition to the existing literature on the study of wind-induced ventilation in urban areas.

Original languageEnglish
Pages (from-to)3055-3060
Number of pages6
JournalEnergy Procedia
Volume78
DOIs
Publication statusPublished - Nov 1 2015
Event6th International Building Physics Conference, IBPC 2015 - Torino, Italy
Duration: Jun 14 2015Jun 17 2015

All Science Journal Classification (ASJC) codes

  • Energy(all)

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