Numerical Simulation and Parameter Optimization of a New Reed–Nylon Net Combined Sand Fence
Abstract
:1. Introduction
2. Numerical Simulation
2.1. Geometric Modeling
2.2. Mesh Generation
2.3. Calculation Parameters
2.4. Control Equations and Solution Setup
3. Comparative Verification of Simulation Settings
3.1. Validation of the Single Wind Field Setup
3.2. Validation of Wind–Sand Two-Phase Flow Setup
3.3. Mesh Independence
4. Results of Numerical Simulation
4.1. Comparison of Reed–Nylon Net Sand Barrier with Double-Row Reed and Double-Row Nylon Net Sand Barrier
4.2. Parameter Optimization of Reed–Nylon Net Sand Barriers
4.2.1. Impact of Spacing
4.2.2. Impact of Porosity
4.2.3. Sand-Blocking Effect
5. Discussion
6. Conclusions
- (1)
- There is a comprehensive consideration of the overall windbreak effect and service life of the sand barriers. The new reed sand barriers have excellent wind resistance, environmental protection, and economic potential. The nylon mesh sand barriers are good sand barriers with good service life. To make up for the shortcomings of the two themselves, we combined them to enhance the practicality of the sand barriers and their economic value.
- (2)
- When the porosity of the new combined sand barrier is 0.3–0.4 and the spacing is 28 H, the wind protection efficiency is high and the effective protection distance is longest. In the practical application process, this range can be used to be more economical and efficient.
- (3)
- When the porosity of the new combined sand barrier is 0.3–0.4 and the spacing is 28 H, the sand accumulation effect is good. The sand accumulation area is concentrated in the sand barrier and the lee side of the second sand barrier, and the sand particles at 1 H height from the surface are effectively intercepted. With the passage of time, the sand gradually migrated backward with the direction of the incoming wind, the amount of sand accumulated on the lee side of the second sand barrier gradually increased, and the sand accumulation rate was greater than that between the sand barriers.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
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Sand Barrier Type | Double-Row Nylon Net Sand Barrier | Reed–Nylon Net Sand Barrier | Double-Row Reed Sand Barriers |
---|---|---|---|
Economy | The cost is more expensive, and the initial investment is large | The cost is less than nylon, and low input costs | Minimal material costs and easy access to obtain |
Service life | It is not easy to decompose, and longer service life in places where the wind is not strong | After combination, the service life can be extended in windy, and the protection efficiency is higher | Short service life, natural decay decomposition |
Wind and sand resistance | Good sand resistance, but not suitable for windy environments | Good sand resistance, suitable for windy environments, the protection efficiency decreases slowly | Good wind protection, but significantly less effective once natural decomposition begins, easily toppled and buried |
Ecological restoration advantage | The material is not easy to degrade and does not improve the soil quality | The reeds in the front row can be disintegrated to make up for the lack of nylon net sand barriers | The material can be naturally decomposed into soil nutrients, improving the soil environment |
EPD/cm | ||||||
---|---|---|---|---|---|---|
Height above the Sand Bed/cm | ||||||
1 cm | 2 cm | |||||
Porosity | Experiment | Simulation | Error | Experiment | Simulation | Error |
0 | 152 | 163 | 7.2% | 168 | 180 | 7.1% |
0.1 | 168 | 175 | 4.1% | 176 | 185 | 5.1% |
0.2 | 168 | 182 | 8.3% | 184 | 195 | 6.0% |
0.3 | 176 | 190 | 7.9% | 192 | 203 | 5.7% |
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Peng, H.; Jin, A.; Zhang, S.; Zheng, B. Numerical Simulation and Parameter Optimization of a New Reed–Nylon Net Combined Sand Fence. Sustainability 2023, 15, 13920. https://doi.org/10.3390/su151813920
Peng H, Jin A, Zhang S, Zheng B. Numerical Simulation and Parameter Optimization of a New Reed–Nylon Net Combined Sand Fence. Sustainability. 2023; 15(18):13920. https://doi.org/10.3390/su151813920
Chicago/Turabian StylePeng, Hao, Afang Jin, Shuzhi Zhang, and Bin Zheng. 2023. "Numerical Simulation and Parameter Optimization of a New Reed–Nylon Net Combined Sand Fence" Sustainability 15, no. 18: 13920. https://doi.org/10.3390/su151813920