Impact of Aspect Ratio and Solar Heating on Street Conyn Air Temperature
The results obtained from RNG (Re-Normalization Group) version of k-? turbulence model are reported in this study. The model is adopted to elucidate the impact of different building aspect ratios (i.e., ratio of building-height-to-street-canyon-width) and solar heating on temperatures in street c...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Mehran University of Engineering and Technology
2011-01-01
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| Series: | Mehran University Research Journal of Engineering and Technology |
| Subjects: | |
| Online Access: | http://publications.muet.edu.pk/research_papers/pdf/pdf66.pdf |
| Summary: | The results obtained from RNG (Re-Normalization Group) version of k-? turbulence
model are reported in this study. The model is adopted to elucidate the impact of different
building aspect ratios (i.e., ratio of building-height-to-street-canyon-width) and solar
heating on temperatures in street canyon. The validation of Navier-Stokes and energy
transport equations showed that the model prediction for air-temperature and ambient
wind provides reasonable accuracy. The model was applied on AR (Aspect Ratios) one to
eight and surface temperature difference (??s-a) of 2 -8. Notably, air-temperatures
were higher in high AR street canyons in particular on the leeward side of the street
canyon. Further investigation showed that the difference between the air-temperature
of high and low AR street canyons ( AR) was positive and high with higher ??s-a.
Conversely, the AR become negative and low gradually with lower values of ??s-a.
These results could be very beneficial for the city and regional planners, civil engineers
and HVAC experts who design street canyons and strive for human thermal comfort
with minimum possible energy requirements. |
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| ISSN: | 0254-7821 2413-7219 |