Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/68622
Title: Effects of lift-up design on pedestrian level wind comfort in different building configurations under three wind directions
Authors: Du, YX 
Mak, CM 
Liu, JL 
Xia, Q 
Niu, JL 
Kwok, KCS
Keywords: Lift-up design
Pedestrian level wind comfort
CFD simulation
Mean wind velocity ratio (MVR)
Mean wind velocity change ratio (Delta MVR)
Issue Date: 2017
Publisher: Pergamon Press
Source: Building and environment, 2017, v. 117, p. 84-99 How to cite?
Journal: Building and environment 
Abstract: The pedestrian level wind environment is seriously deteriorated by moderated local wind flow in a densely built-up subtropical city like Hong Kong. In order to improve the weak wind condition, the lift up design has been used for some time. However, there is a lack of understanding and quantitative assessment of its modification on the pedestrian level wind comfort around different building configurations under different wind directions. This paper aims to study the effects of lift-up design in four common building configurations on the wind comfort via computational fluid dynamics (CFD) simulations. The turbulence model and numerical method are firstly validated by comparing the simulated wind flow data with the wind tunnel test results. The validated model is then utilized to simulate the four building, configurations, including the "-", "L", "U" and "square" shaped buildings. The mean wind velocity ratio (MVR) and mean wind velocity change ratio (Delta MVR) are employed to identify the wind comfort and to quantitatively evaluate the improvements due to the lift-up design. Results show that the lift-up design can improve the wind comfort in building surroundings and its influence is highly dependent on the incident wind direction. Specifically, the wind comfort is better under the oblique wind direction than the other two wind directions. These findings can provide us a better understanding of the lift-up design and will be helpful in better precinct planning.
URI: http://hdl.handle.net/10397/68622
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2017.03.001
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

14
Last Week
1
Last month
Citations as of Apr 19, 2018

WEB OF SCIENCETM
Citations

10
Last Week
1
Last month
Citations as of Apr 21, 2018

Page view(s)

66
Last Week
1
Last month
Citations as of Apr 22, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.