Control of Sand Movement on Model Dune by Fence Installation Experimental Study by Visualization and LDV
Recent desertification has been one of serious environmental issues. It is important to elucidate mechanisms of the sand movement from sand dunes with considering the relations between the dune shape and the turbulent air flow. This relation can be applied to predict and prevent the desertification. In this study, the shape of the dune surface and the erosion rate are measured by the method of laser-sheet visualization. Laser-doppler velocimetry (LDV) has been used for turbulence measurement. Effects of an installed fence on the erosion rate are discussed with emphasis on influences of its position and height. The erosion has been either suppressed or enhanced by the fence. Since there exist two strong erosion areas due to the backflow and wake induced by the fence. In the present experimental conditions, the top of the dune is the most suitable position of the fence for preventing erosion.
Gas-solid two phase flow Sand movement Dune Fence Turbulent flow Visualization LDV
Yusuke Sakamoto Shota Shimazu Takahiro Tsukahara Makoto Yamamoto Yasuo Kawaguchi
Dept of Mech.Eng., Faculty of Sci.Tech., Tokyo University of Science, Japan Dept.of Mech.Eng., Faculty of Sci.Tech., Tokyo niversity of Science, Japan Dept.of Mech.Eng., Faculty of Eng., Div.I, Tokyo University of Science, Japan
国际会议
西安
英文
95-100
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）