LES Analysis of the Effect of Snowdrift on Wind Pressure on a Low-Rise Building
Abstract
:1. Introduction
2. Research Object and Numerical Methodology
2.1. Geometry Model with Snowdrift
2.2. LES Turbulent Model
2.3. Domain Size and Boundary Conditions
2.4. Solution Scheme and Setting Parameters
2.5. Data Sampling and Processing
3. Sensitivity Analyses and Validation
3.1. Check the Grid Independence
3.2. Influence of the Sampling Time
3.3. Self-Preservation Test of the Oncoming Flow
3.4. Validation
4. Results and Analyses
4.1. Airflow
4.1.1. Time-Averaged Streamwise Velocity
4.1.2. Instantaneous Flow Feature
4.2. Wind Pressure Coefficient on Roof
4.2.1. Time-Averaged and Standard Deviation Pressure Coefficient on Roof
4.2.2. Area-Averaged Pressure Coefficient in the Windward Region
4.3. Probability Density and Energy Spectrum of Fluctuating Pressure
4.3.1. Distribution of Probability Density Function
4.3.2. Frequency Domain Features
4.4. Cross-Correlation Analysis
4.4.1. Streamwise Correlation
4.4.2. Spanwise Correlation
4.5. POD Analysis
5. Conclusions
6. Discussion and Limitation
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Model | L/H | W/H | Case Description |
---|---|---|---|
Model 1 | 1 | 2 | No snow (M1_N) |
Snowdrift (M1_S) | |||
Model 2 | 2 | 2 | No snow (M2_N) |
Snowdrift (M2_S) | |||
Model 3 | 3 | 2 | No snow (M3_N) |
Snowdrift (M3_S) | |||
Model 4 | 2 | 1 | No snow (M4_N) |
Snowdrift (M4_S) | |||
Model 5 | 2 | 3 | No snow (M5_N) |
Snowdrift (M5_S) |
Mesh Type | Grid Numbers on Building Surfaces | The Height of the First Grid on Building Surfaces (m) | Grid Numbers | y+ on Building Surfaces |
---|---|---|---|---|
G1 | 70.3 | |||
G2 | 188.6 | |||
G3 | 534.7 |
Description of Building Models | The Proportion of Modes (%) | The Total Proportion of the First 20 Modes (%) | ||||||
---|---|---|---|---|---|---|---|---|
1st | 2nd | 3rd | 10th | 15th | 20th | |||
M1 | N | 31.50 | 15.58 | 11.62 | 1.36 | 0.75 | 0.45 | 88.51 |
S | 29.66 | 10.94 | 9.61 | 1.70 | 0.91 | 0.60 | 82.07 | |
M2 | N | 22.59 | 16.60 | 8.88 | 2.08 | 1.02 | 0.67 | 83.75 |
S | 26.74 | 9.66 | 5.98 | 1.61 | 1.06 | 0.70 | 72.84 | |
M3 | N | 19.12 | 14.16 | 7.16 | 1.93 | 1.14 | 0.76 | 75.02 |
S | 20.59 | 9.97 | 7.55 | 1.80 | 1.14 | 0.73 | 70.65 | |
M4 | N | 30.12 | 12.75 | 7.66 | 1.70 | 1.02 | 0.65 | 83.00 |
S | 29.12 | 10.03 | 8.10 | 1.73 | 0.91 | 0.64 | 80.33 | |
M5 | N | 19.70 | 13.30 | 8.15 | 1.82 | 1.09 | 0.72 | 74.03 |
S | 21.24 | 10.76 | 7.18 | 1.67 | 1.11 | 0.74 | 70.02 |
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Liu, Z.; Yu, Z.; Chen, Y.; He, H.; Chen, X. LES Analysis of the Effect of Snowdrift on Wind Pressure on a Low-Rise Building. Buildings 2022, 12, 1387. https://doi.org/10.3390/buildings12091387
Liu Z, Yu Z, Chen Y, He H, Chen X. LES Analysis of the Effect of Snowdrift on Wind Pressure on a Low-Rise Building. Buildings. 2022; 12(9):1387. https://doi.org/10.3390/buildings12091387
Chicago/Turabian StyleLiu, Zhixiang, Zhixiang Yu, Yang Chen, Huan He, and Xiaoxiao Chen. 2022. "LES Analysis of the Effect of Snowdrift on Wind Pressure on a Low-Rise Building" Buildings 12, no. 9: 1387. https://doi.org/10.3390/buildings12091387