Shelter effect of a fir tree with different porosities

2014 ◽  
Vol 28 (2) ◽  
pp. 565-572 ◽  
Author(s):  
Jin-Pyung Lee ◽  
Eui-Jae Lee ◽  
Sang-Joon Lee
Keyword(s):  
Shelter Effect

Effect of a Bottom Gap on the Flow Characteristics behind Non-Planar Porous Fence

2011 ◽  
Vol 356-360 ◽  
pp. 1391-1395 ◽  
Author(s):  
Zhen Ya Duan ◽  
Wen Xiang Yang ◽  
Tian Shun Wang ◽  
Jun Mei Zhang
Keyword(s):  
Turbulence Intensity ◽  
Flow Characteristics ◽  
Stream Velocity ◽  
Large Area ◽  
Mean Velocity ◽  
Gap Ratio ◽  
Shelter Effect ◽  
Wind Reduction ◽  
Porous Fence ◽  
Velocity Field Measurement

The flow field behind non-planar porous fence of geometric porosity ε=0.273 with various bottom gaps (G) has been investigated by hot-wire anemometer velocity field measurement technique in a wind tunnel experiment. Seven gap ratios G/H=0.000, 0.025, 0.075, 0.125, 0.150, 0.175, 0.200 of non-planar porous fence were tested in this study with the free-stream velocity fixed at 10m/s. The experimental data were analyzed and the turbulence intensity and wind reduction ratios for different gaps of the porous fence were calculated to estimate the shelter effect of a non-planar porous fence model. The results show that the gap ratio G/H=0.150 gives the best shelter effect among the seven gaps of the non-planar porous fence tested in this study, having a better mean velocity and turbulence intensity as well as wind reduction ratio in a large area behind the non-planar porous fence.

Shelter effect efficacy of sand fences: A comparison of systems in a wind tunnel

2018 ◽  
Vol 30 ◽  
pp. 32-40 ◽  
Author(s):  
Tao Wang ◽  
Jianjun Qu ◽  
Yuquan Ling ◽  
Benli Liu ◽  
Jianhua Xiao
Keyword(s):  
Wind Tunnel ◽  
Sand Fences ◽  
Shelter Effect

Simulated Analysis of Exploiting Space Flow Field on the Environmental Wind Influence in the Open Pit Mine

2012 ◽  
Vol 610-613 ◽  
pp. 1078-1082
Author(s):  
Jian Lin Liu ◽  
Heng Gen Shen ◽  
Zhen Liang ◽  
Rui Zhou ◽  
Min Fang
Keyword(s):  
Wind Speed ◽  
Cfd Simulation ◽  
Reverse Flow ◽  
Open Pit ◽  
Measured Velocity ◽  
Wind Influence ◽  
Computational Fluid Dynamics Cfd ◽  
Shelter Effect ◽  
Simulated Analysis ◽  
The Hill

This paper focuses on computational fluid dynamics (CFD) simulation of the dynamic exploited influence of wind field in the open pit quarry. We have picked up 3 normal exploitation parameters, e.g. the exploited depth z, the type of small hills and the measured velocity u1, 7 simulated experiments have been done by software Fluent as well. In our experiments, the features of velocity field around the mine are shown, with the effects of open pit quarry, so as to analyze the changes of wind speed when it gets through this mine. To be exact, it will be possible to deduce there is negative correlation between the velocity decreased gratitude and the exploited depth. Besides, with the shelter effect of a small hill, the wind speed tends to slow down near this hill, and turn back to rise until the flow leaves the hill far away. The velocity decreasing has positive correlation with the measured velocity u1, and the reverse flow is more likely to appear with higher u1.

scholarly journals Influence of Thinning on the Shelter Effect of Windbreaks.

2005 ◽  
Vol 87 (1) ◽  
pp. 85-89 ◽  
Author(s):  
H Ozawa ◽  
T. Sakamoto
Keyword(s):  
Shelter Effect

Cross-Section Model Test on Shelter Effect of Pile Jetty on Revetment

2014 ◽  
Vol 1065-1069 ◽  
pp. 475-479
Author(s):  
Yun Peng Jiang ◽  
Feng Gao
Keyword(s):  
Cross Section ◽  
Wave Height ◽  
Model Test ◽  
Structure Design ◽  
Wave Overtopping ◽  
Reflected Wave ◽  
Typical Type ◽  
Section Model ◽  
Shelter Effect ◽  
Port Engineering

Pile jetty is a typical type of wharf in construction of port engineering and was often built in front of revetment. The reflected wave height, wave overtopping and pressure were usually reduced because of the barrier effect of upper platform and piles. Cross-section model test was in common use for the verification of structure design. The shelter effect of pile jetty on revetment was tested through cross-section wave physical model. Model scale was 1:20. The results show that the shelter effect is fairly obvious in high design water level. The reduction percentage was 33% of reflected wave height, 50% of wave overtopping and 30-50% of wave loading.

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