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논문 기본 정보

자료유형
학술대회자료
저자정보
Ning Zhang (Dalian University of Technology) Sang-Joon Lee (포항공과대학교)
저널정보
한국가시화정보학회 한국가시화정보학회 학술발표대회 논문집 2009년도 한국가시화정보학회 추계학술대회
발행연도
2009.11
수록면
128 - 131 (4page)

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초록· 키워드

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A porous wind fence is an artificial barrier which is widely employed to abate wind erosion. In this study, the shelter effect of a porous wind fence on saltating sand was investigated experimentally in a simulated atmospheric boundary layer. A wind fence of porosity ε=38.5% was installed on a flat bed of sand collected from a beach (diameter d=200-300μm ). A high-speed digital camera was used to capture consecutive images of saltating sand particles around the fence at a frame rate of 4000fps. In addition, the PTV method was employed to extract the instantaneous velocity fields of saltating sand particles. From these data, the particle mean velocity and mass flux were evaluated. The results reveal that the mean velocities exhibit a dramatic decrease in the leeward side of the fence, and a high-velocity region exists in the shear layer above the fence. The sand mass flux distributions with height around fence are represented by an exponential function. Both the particle concentration and mass flux decay dramatically in the leeward region. The present experimental results would provide useful information to understand the sand transport through a porous fence and to devise a new control measure of wind erosion of sand particles.

목차

Abstract
1. Introduction
2. Experimental Apparatus
3. Results and discussion
4. Conclusion
Acknowledges
References

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