Evolution of downsized crescent-shaped dune in wind tunnel experiment
Evolution of downsized crescent-shaped dune in wind tunnel experiment
复制标题
风洞实验中小型月牙形沙丘的演化
DOI：
10.1007/s11433-013-5261-8
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
JIA Pan
中科院分区：
文献类型：
--
作者：
ZHANG Yang;WANG Yuan;JIA Pan
在风洞实验中研究了缩小的新月形沙丘的迁移。引入量化的逆风流入量和沙床的垂直振荡来调节沙丘表面上方沙通量的饱和水平，从而影响沙丘的演化。通过顶视图摄影记录演化过程，然后使用数字图像处理算法将其抽象为自定义特征量的演化。结果表明，与展向量的情况相比，流向量的演化更积极地以单调和收敛的方式对应于调制幅度的线性增加。与迎风面的量相比，角的量的变化随时间是非单调的，并且与调制强度的变化几乎不相关，这揭示了背风演化的独特性。
The migration of a downsized crescent-shaped dune was investigated in a wind tunnel experiment. Quantified upwind influx and vertical oscillation of the sand bed were introduced to modulate the saturation level of the sand flux above the dune surface to affect dune evolution. The evolution was recorded by top-view photography and then abstracted as the evolution of self-defined characteristic quantities using a digital image processing algorithm. The results showed that, in contrast to the case for spanwise quantities, the evolution of streamwise quantities corresponds to a linear increase in the modulation magnitude more positively and in a monotonic and convergent manner. In contrast with quantities on the windward face, the changes in quantities with respect to the horns were nonmonotonic with time and almost uncorrelated with the variation in modulation strength, which reveals the distinctiveness of leeside evolution.
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DOI：
10.1103/physreve.78.021304
发表时间：
2008-08
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
C. Groh;A. Wierschem;N. Aksel;I. Rehberg;C. Kruelle
通讯作者：
C. Groh;A. Wierschem;N. Aksel;I. Rehberg;C. Kruelle
影响因子：
3.3
作者：
N. Endo;T. Sunamura;H. Takimoto
通讯作者：
N. Endo;T. Sunamura;H. Takimoto
影响因子：
3.9
作者：
Parteli, E. J. R.;Schwaemmle, V.;Maia, L. P.
通讯作者：
Maia, L. P.
影响因子：
3.7
作者：
Andreotti, B
通讯作者：
Andreotti, B
DOI：
10.2307/622601
发表时间：
1995-10
期刊：
--
影响因子：
--
作者：
N. Lancaster
通讯作者：
N. Lancaster