The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature
Previous studies have demonstrated that vegetation and increased air flow can mitigate air temperature by employing numerical models, satellite remote sensing or Computational Fluid Dynamics simulations. This study aimed to examine how layouts of vegetation space and wind flow affect microclimate ai...
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doaj-7cb81e774b824504a1c109c554e1c4362020-11-24T21:56:52ZengMDPI AGSustainability2071-10502019-05-011111308110.3390/su11113081su11113081The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air TemperatureMengyu Zhang0Woongkyoo Bae1Jeeyeop Kim2Department of Urban Design and Studies, Chung-ang University, Seoul 06974, KoreaDepartment of Urban Design and Studies, Chung-ang University, Seoul 06974, KoreaDepartment of Architecture, Ajou University, Suwon 16499, KoreaPrevious studies have demonstrated that vegetation and increased air flow can mitigate air temperature by employing numerical models, satellite remote sensing or Computational Fluid Dynamics simulations. This study aimed to examine how layouts of vegetation space and wind flow affect microclimate air temperature, which directly affects city dwellers’ thermal comfort in summer, in a real apartment housing complex in Seoul, South Korea. To do this, a Reynolds-averaged Navier−Stokes model was utilized, combined with a finite volume method CFD simulation, and which measured transpirational cooling effects of vegetation by comprehensively considering air humidity by transpiration, as well as wind flow of the surroundings, to reflect actual conditions of urban environments. Based on the computational model, nine scenarios including elevated building designs were simulated. The findings of this study are as follows: First, different layouts of vegetation and wind flow clearly affected microclimate air temperature in the housing complex. Second, when the total area of vegetation was the same, it was more effective to reduce air temperature by placing it in small units rather than concentrating it in one place, and placing small vegetation spaces close to buildings was better than locating them between buildings. Third, it was apparent that an elevated space works as a wind path, leading to increasing wind velocity. However, it was revealed that wind flow does not always positively affect hot temperatures.https://www.mdpi.com/2071-1050/11/11/3081microclimate air temperaturethermal mitigationCFDurban heat islandvegetationwind flow |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mengyu Zhang Woongkyoo Bae Jeeyeop Kim |
spellingShingle |
Mengyu Zhang Woongkyoo Bae Jeeyeop Kim The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature Sustainability microclimate air temperature thermal mitigation CFD urban heat island vegetation wind flow |
author_facet |
Mengyu Zhang Woongkyoo Bae Jeeyeop Kim |
author_sort |
Mengyu Zhang |
title |
The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature |
title_short |
The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature |
title_full |
The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature |
title_fullStr |
The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature |
title_full_unstemmed |
The Effects of the Layouts of Vegetation and Wind Flow in an Apartment Housing Complex to Mitigate Outdoor Microclimate Air Temperature |
title_sort |
effects of the layouts of vegetation and wind flow in an apartment housing complex to mitigate outdoor microclimate air temperature |
publisher |
MDPI AG |
series |
Sustainability |
issn |
2071-1050 |
publishDate |
2019-05-01 |
description |
Previous studies have demonstrated that vegetation and increased air flow can mitigate air temperature by employing numerical models, satellite remote sensing or Computational Fluid Dynamics simulations. This study aimed to examine how layouts of vegetation space and wind flow affect microclimate air temperature, which directly affects city dwellers’ thermal comfort in summer, in a real apartment housing complex in Seoul, South Korea. To do this, a Reynolds-averaged Navier−Stokes model was utilized, combined with a finite volume method CFD simulation, and which measured transpirational cooling effects of vegetation by comprehensively considering air humidity by transpiration, as well as wind flow of the surroundings, to reflect actual conditions of urban environments. Based on the computational model, nine scenarios including elevated building designs were simulated. The findings of this study are as follows: First, different layouts of vegetation and wind flow clearly affected microclimate air temperature in the housing complex. Second, when the total area of vegetation was the same, it was more effective to reduce air temperature by placing it in small units rather than concentrating it in one place, and placing small vegetation spaces close to buildings was better than locating them between buildings. Third, it was apparent that an elevated space works as a wind path, leading to increasing wind velocity. However, it was revealed that wind flow does not always positively affect hot temperatures. |
topic |
microclimate air temperature thermal mitigation CFD urban heat island vegetation wind flow |
url |
https://www.mdpi.com/2071-1050/11/11/3081 |
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