TY - GEN
T1 - Wind tunnel experiments on how a porous fence affects flow and erosion on sand dune
AU - Aoshima, Daisuke
AU - Nakamura, Itsuki
AU - Sakamoto, Yusuke
AU - Tsukahara, Takahiro
AU - Yamamoto, Makoto
AU - Kawaguchi, Yasuo
PY - 2010
Y1 - 2010
N2 - For the purpose of combating desertification, it is important to understand mechanisms of the wind-blown sand movement, which is essentially a complicated two-phase flow phenomenon of sand particles and air. Therefore, we investigated the flow field around a model dune and the erosion process of the dune. In this study, we employed a porous fence, which was installed on the model dune, and examined its effect on the sand movement. The erosion process and its relationship with the turbulent intensity and the flow around the dune were discussed focusing on dependence of the flow field on the fence porosity. We tested four types of porous fences, which had different porosities: 0% (no permeability), 10%, 30%, and 50%. How a position of the fence affects suppression of the dune erosion was also examined. In the present experimental range, it can be concluded that the most effective fence position to suppress the sand movement should depend on porosity of the fence.
AB - For the purpose of combating desertification, it is important to understand mechanisms of the wind-blown sand movement, which is essentially a complicated two-phase flow phenomenon of sand particles and air. Therefore, we investigated the flow field around a model dune and the erosion process of the dune. In this study, we employed a porous fence, which was installed on the model dune, and examined its effect on the sand movement. The erosion process and its relationship with the turbulent intensity and the flow around the dune were discussed focusing on dependence of the flow field on the fence porosity. We tested four types of porous fences, which had different porosities: 0% (no permeability), 10%, 30%, and 50%. How a position of the fence affects suppression of the dune erosion was also examined. In the present experimental range, it can be concluded that the most effective fence position to suppress the sand movement should depend on porosity of the fence.
UR - http://www.scopus.com/inward/record.url?scp=80054992722&partnerID=8YFLogxK
U2 - 10.1115/FEDSM-ICNMM2010-30957
DO - 10.1115/FEDSM-ICNMM2010-30957
M3 - Conference contribution
AN - SCOPUS:80054992722
SN - 9780791849484
T3 - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
SP - 2837
EP - 2842
BT - ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010
T2 - ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
Y2 - 1 August 2010 through 5 August 2010
ER -