Investigation of the Wind-Direction Effect on Buoyancy-Driven Fire Smoke Dispersion in an Urban Street Canyon
Abstract
:1. Introduction
2. Modeling
2.1. Physical Model Configuration
2.2. Grid Sensitivity
3. Results and Discussion
3.1. Smoke-Dispersion Behavior and Flow Field Inside the Street Canyon for Various Wind-Direction Conditions
3.2. The Effect of Wind Direction on the Critical Recirculation Velocity of Smoke
3.3. A New Correlation between the Critical Froude Number and Recirculation Behavior
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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θ (°) | Wind Velocity (m/s) | |||||
---|---|---|---|---|---|---|
0 | 2.6 | 2.7 | 2.8 | 2.9 | 3.0 | / |
5 | 2.6 | 2.7 | 2.8 | 2.9 | 3.0 | 3.1 |
10 | 2.8 | 2.9 | 3.0 | 3.1 | 3.2 | 3.3 |
15 | 2.9 | 3.0 | 3.1 | 3.2 | 3.3 | / |
20 | 3.0 | 3.1 | 3.2 | 3.3 | 3.4 | / |
25 | 3.1 | 3.2 | 3.3 | 3.4 | 3.5 | / |
30 | 3.2 | 3.3 | 3.4 | 3.5 | 3.6 | / |
35 | 3.3 | 3.4 | 3.5 | 3.6 | 3.7 | / |
40 | 3.4 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 |
45 | 3.5 | 3.6 | 3.7 | 3.8 | 3.9 | 4.0 |
50 | 3.6 | 3.7 | 3.8 | 3.9 | 4.0 | 4.1 |
55 | 3.7 | 3.8 | 3.9 | 4.0 | 6.0 | 10.0 |
60 | 4.0 | 6.0 | 8.0 | 10.0 | / | / |
65 | 4.0 | 6.0 | 8.0 | 10.0 | / | / |
θ (°) | VC (m/s) | ∆Tz (°C) | Fr |
---|---|---|---|
0 | 2.8 | 38.9 | 0.579 |
5 | 2.9 | 35.5 | 0.627 |
10 | 3 | 35.3 | 0.651 |
15 | 3.1 | 33.3 | 0.692 |
20 | 3.2 | 33.1 | 0.717 |
25 | 3.3 | 32.4 | 0.747 |
30 | 3.4 | 33.7 | 0.755 |
35 | 3.5 | 33.8 | 0.776 |
40 | 3.7 | 37.3 | 0.781 |
45 | 3.8 | 37.8 | 0.797 |
50 | 3.9 | 35.7 | 0.841 |
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Lu, K.; Xiang, Y.; Yu, S.; Wang, J.; Mao, S. Investigation of the Wind-Direction Effect on Buoyancy-Driven Fire Smoke Dispersion in an Urban Street Canyon. Int. J. Environ. Res. Public Health 2023, 20, 2568. https://doi.org/10.3390/ijerph20032568
Lu K, Xiang Y, Yu S, Wang J, Mao S. Investigation of the Wind-Direction Effect on Buoyancy-Driven Fire Smoke Dispersion in an Urban Street Canyon. International Journal of Environmental Research and Public Health. 2023; 20(3):2568. https://doi.org/10.3390/ijerph20032568
Chicago/Turabian StyleLu, Kaihua, Yanqing Xiang, Songyang Yu, Jie Wang, and Shaohua Mao. 2023. "Investigation of the Wind-Direction Effect on Buoyancy-Driven Fire Smoke Dispersion in an Urban Street Canyon" International Journal of Environmental Research and Public Health 20, no. 3: 2568. https://doi.org/10.3390/ijerph20032568