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Numerical Simulation of Wind Field and Sand Flux in Crescentic Sand Dunes by Zhang, Huiwen (author);Wu, Zhen (author);Hu, Jing (author);Zhang, Zhiping (author);Xiao, Bin (author);Ma, Jianping (author) is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract Sand flux is the key factor to determine the migration of sand dunes and the erosion to the surrounding environment. There are crescent-shaped sand dunes of various scales in the desert, and there are significant differences in spatial wind field and sand flux among them. However, due to the difficulty of monitoring, it is difficult to continuously observe the spatial wind field and sand flux around the larger crescentic dunes. On the basis of the Reynolds-Average Navier–Stokes (RA-NS) equation and the stress and sand flux model, the distribution of wind field and sand flux of a circular dune with a height of 4.2 m and a length of about 100 m during the four evolutionary periods of the evolution into a crescentic dune was simulated in this study. By comparing with the measured results, we verified that the closer to the leeward side, the more the simulated values of the velocity in wind field and sand flux were in line with the measured results. In order to further analyze the influence of the height of dune and other relevant parameters on sand flux, we simulated the influence on wind field and sand flux by changing the air viscosity and wind velocity of upper boundary

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Author

Zhang, Huiwen (author);Wu, Zhen (author);Hu, Jing (author);Zhang, Zhiping (author);Xiao, Bin (author);Ma, Jianping (author)

Publisher

Springer Science and Business Media LLC

Published

2021

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)