Impacts of building layout on pedestrian level wind comfort and gas pollutant diffusion
,
Abstract
Introduction: The impacts of building layout on pedestrian level wind
comfort and gas pollutant diffusion are simulated using computational fluid
dynamics method.
Materials and methods: The control equations of flow and pollutant diffusion
are solved by using ANSYS Fluent. The SIMPLE algorithm is selected for the
pressure-velocity coupling. The data from wind tunnel experiment at Tokyo
Polytechnic University is employed in the validation case.
Results: The velocity field and turbulence intensity at pedestrian level under
different building layouts are obtained. The distribution and evaluation of
wind comfort grade and pollutant concentration are given.
Conclusion: Building layouts have significant impacts on flow and pollutant
diffusion at pedestrian level. The outward staggered layout of building group
can improve both wind comfort grade and air quality, but the inward staggered
layout has the adverse effect. Non-staggered layouts are the worst in terms of
the wind comfort grade in this paper.
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compact urban environments. Building and
Environment. 2019 Jan 15;148:508-23
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simulation of effects of dimension changes of
buildings on pollution dispersion in the built
environment. Alexandria Engineering Journal.
2016 Dec 1;55(4):3135-44
13. Sha C, Wang X, Lin Y, Fan Y, Chen X,
Hang J. The impact of urban open space and
‘lift-up’ building design on building intake
fraction and daily pollutant exposure in
idealized urban models. Science of The Total
Environment. 2018 Aug 15;633:1314-28.
14. Chavez M, Hajra B, Stathopoulos T,
Bahloul A. Near-field pollutant dispersion in
the built environment by CFD and wind tunnel
simulations. Journal of Wind Engineering
and Industrial Aerodynamics. 2011 Apr
1;99(4):330-9.
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R, Di Sabatino S. The influence of building
height variability on pollutant dispersion and
pedestrian ventilation in idealized high-rise
urban areas. Building and Environment. 2012
Oct 1;56:346-60.
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of building roof on air quality in urban street
canyons. Atmospheric Environment. 2011 Sep
1;45(29):5220-9.
17. Takano Y, Moonen P. On the influence of
roof shape on flow and dispersion in an urban
street canyon. Journal of Wind Engineering
and Industrial Aerodynamics. 2013 Dec
1;123:107-20.
18. Murena F, Mele B. Effect of balconies on
air quality in deep street canyons. Atmospheric
Pollution Research. 2016 Nov 1;7(6):1004-12.
19. Llaguno-Munitxa M, Bou-Zeid E,
Hultmark M. The influence of building
geometry on street canyon air flow: validation
of large eddy simulations against wind tunnel
experiments. Journal of Wind Engineering and
Industrial Aerodynamics. 2017 Jun 1;165:115-
30.
20. Ai ZT, Mak CM. CFD simulation of flow in
a long street canyon under a perpendicular wind
direction: Evaluation of three computational
settings. Building and Environment. 2017 Mar
1;114:293-306.
21. Zhang YW, Gu ZL, Cheng Y, Lee SC.
Effect of real-time boundary wind conditions
on the air flow and pollutant dispersion in an
urban street canyon—large eddy simulations.
Atmospheric Environment. 2011 Jun
1;45(20):3352-9.
22. Yu Y, Kwok KC, Liu XP, Zhang Y. Air
pollutant dispersion around high-rise buildings
under different angles of wind incidence.
Journal of Wind Engineering and Industrial
Aerodynamics. 2017 Aug 1;167:51-61.
23. Tominaga Y, Stathopoulos T. CFD simulation
of near-field pollutant dispersion in the urban
environment: A review of current modeling
techniques. Atmospheric Environment. 2013
Nov 1;79:716-30.
24. Fluent Inc, 2010. Fluent 13.0. Theory
guide. Fluent Inc, Canonsburg, PA.
25. Tanaka H, Yoshie R, Hu CH.
Uncertainty in measurements of velocity
and concentration around a building.
InProceedings of the 4th International
Symposium on Computational Wind
Engineering 2006 Jun (pp. 549-552).
26. Tominaga Y, Mochida A, Yoshie R,
Kataoka H, Nozu T, Yoshikawa M, Shirasawa
T. AIJ guidelines for practical applications of
CFD to pedestrian wind environment around
buildings. Journal of Wind Engineering and
Industrial Aerodynamics. 2008 Oct 1;96(10-
11):1749-61.
27. Yu H, Thé J. Validation and optimization
of SST k-ω turbulence model for pollutant
dispersion within a building array. Atmospheric
Environment. 2016 Nov 1;145:225-38.
Pedestrian-level wind conditions around
buildings: Review of wind-tunnel and CFD
techniques and their accuracy for wind comfort
assessment. Building and Environment. 2016
May 1;100:50-81.
2. Toparlar Y, Blocken B, Maiheu B, Heijst
GJ. A review on the CFD analysis of urban
microclimate. Renewable and Sustainable
Energy Reviews. 2017 Dec 1;80:1613-40.
3. Stathopoulos T. Pedestrian level winds
and outdoor human comfort, Journal of Wind
Engineering and Industrial Aerodynamics.
2006 Nov 1;94(11):769-80.
4. Mittal H, Sharma A, Gairola A. A review
on the study of urban wind at the pedestrian
level around buildings. Journal of Building
Engineering. 2018 Jul 1;18:154-63.
5. Shui T, Liu J, Yuan Q, Qu Y, Jin H, Cao
J, Liu L, Chen X. Assessment of pedestrianlevel wind conditions in severe cold regions
of China. Building and Environment. 2018
May 1;135:53-67.
6. Liu J, Niu J, Du Y, Mak CM, Zhang Y. LES
for pedestrian level wind around an idealized
building array—Assessment of sensitivity to
influencing parameters, Sustainable Cities
and Society. 2019 Jan 1;44:406-15.
7. Mittal H, Sharma A, Gairola A. Numerical
simulation of pedestrian level wind flow around
buildings: Effect of corner modification and
orientation. Journal of Building Engineering.
2019 Mar 1;22:314-26.
8. Du Y, Mak CM. Effect of lift-up design on
pedestrian level wind comfort around isolated
building under different wind directions.
Procedia Engineering. 2017 Jan 1;205:296-
301.
9. Du Y, Mak CM, Liu J, Xia Q, Niu J, Kwok
KC. Effects of lift-up design on pedestrian
level wind comfort in different building
configurations under three wind directions.
Building and Environment. 2017 May
15;117:84-99.
10. Chew LW, Norford LK. Pedestrian-level
wind speed enhancement in urban street canyons with void decks. Building and
Environment. 2018 Dec 1;146:64-76.
11. An K, Wong SM, Fung JC. Exploration
of sustainable building morphologies for
effective passive pollutant dispersion within
compact urban environments. Building and
Environment. 2019 Jan 15;148:508-23
12. Bijad E, Delavar MA, Sedighi K. CFD
simulation of effects of dimension changes of
buildings on pollution dispersion in the built
environment. Alexandria Engineering Journal.
2016 Dec 1;55(4):3135-44
13. Sha C, Wang X, Lin Y, Fan Y, Chen X,
Hang J. The impact of urban open space and
‘lift-up’ building design on building intake
fraction and daily pollutant exposure in
idealized urban models. Science of The Total
Environment. 2018 Aug 15;633:1314-28.
14. Chavez M, Hajra B, Stathopoulos T,
Bahloul A. Near-field pollutant dispersion in
the built environment by CFD and wind tunnel
simulations. Journal of Wind Engineering
and Industrial Aerodynamics. 2011 Apr
1;99(4):330-9.
15. Hang J, Li Y, Sandberg M, Buccolieri
R, Di Sabatino S. The influence of building
height variability on pollutant dispersion and
pedestrian ventilation in idealized high-rise
urban areas. Building and Environment. 2012
Oct 1;56:346-60.
16. Yassin MF. Impact of height and shape
of building roof on air quality in urban street
canyons. Atmospheric Environment. 2011 Sep
1;45(29):5220-9.
17. Takano Y, Moonen P. On the influence of
roof shape on flow and dispersion in an urban
street canyon. Journal of Wind Engineering
and Industrial Aerodynamics. 2013 Dec
1;123:107-20.
18. Murena F, Mele B. Effect of balconies on
air quality in deep street canyons. Atmospheric
Pollution Research. 2016 Nov 1;7(6):1004-12.
19. Llaguno-Munitxa M, Bou-Zeid E,
Hultmark M. The influence of building
geometry on street canyon air flow: validation
of large eddy simulations against wind tunnel
experiments. Journal of Wind Engineering and
Industrial Aerodynamics. 2017 Jun 1;165:115-
30.
20. Ai ZT, Mak CM. CFD simulation of flow in
a long street canyon under a perpendicular wind
direction: Evaluation of three computational
settings. Building and Environment. 2017 Mar
1;114:293-306.
21. Zhang YW, Gu ZL, Cheng Y, Lee SC.
Effect of real-time boundary wind conditions
on the air flow and pollutant dispersion in an
urban street canyon—large eddy simulations.
Atmospheric Environment. 2011 Jun
1;45(20):3352-9.
22. Yu Y, Kwok KC, Liu XP, Zhang Y. Air
pollutant dispersion around high-rise buildings
under different angles of wind incidence.
Journal of Wind Engineering and Industrial
Aerodynamics. 2017 Aug 1;167:51-61.
23. Tominaga Y, Stathopoulos T. CFD simulation
of near-field pollutant dispersion in the urban
environment: A review of current modeling
techniques. Atmospheric Environment. 2013
Nov 1;79:716-30.
24. Fluent Inc, 2010. Fluent 13.0. Theory
guide. Fluent Inc, Canonsburg, PA.
25. Tanaka H, Yoshie R, Hu CH.
Uncertainty in measurements of velocity
and concentration around a building.
InProceedings of the 4th International
Symposium on Computational Wind
Engineering 2006 Jun (pp. 549-552).
26. Tominaga Y, Mochida A, Yoshie R,
Kataoka H, Nozu T, Yoshikawa M, Shirasawa
T. AIJ guidelines for practical applications of
CFD to pedestrian wind environment around
buildings. Journal of Wind Engineering and
Industrial Aerodynamics. 2008 Oct 1;96(10-
11):1749-61.
27. Yu H, Thé J. Validation and optimization
of SST k-ω turbulence model for pollutant
dispersion within a building array. Atmospheric
Environment. 2016 Nov 1;145:225-38.
| Files | ||
| Issue | Vol 6 No 2 (2021): Spring 2021 | |
| Section | Original Research | |
| DOI | https://doi.org/10.18502/japh.v6i2.7954 | |
| Keywords | ||
| Building layout; Computational fluid dynamics (CFD); Pedestrian level wind comfort; Gas pollutant diffusion | ||
| Rights and permissions | |
|
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
How to Cite
1.
Yang Y, Zhang T, Xie H, Wang X. Impacts of building layout on pedestrian level wind comfort and gas pollutant diffusion. JAPH. 2021;6(2):117-134.
