发布时间：2024-11-20

文章标题：【学术成果】一篇合作作者文章在国际学术期刊 Physics of Fluids 上发表

内容：

本文研究了非稳态风对沙输运的影响，推导出一个适用于稳态和非稳态流动条件的风沙输运公式~

 

Cited as: Liu, Y., Yang, B., Zhang, Y., Lin, Y., & Gao, X. (2024). An equivalent analysis of unsteady sand transport in a wind tunnel. Physics of Fluids, 36(11).

https://doi.org/10.1063/5.0235974

 

Abstract: This study investigates the effect of unsteady wind on sand transport in a wind tunnel using sinusoidally varying wind velocity to represent the unsteady wind. By comparing sand transport fluxes under steady and unsteady winds, we demonstrate that cumulative sand transport flux varies sinusoidally with the sinusoidally varying wind velocity. In addition to the time-averaged wind velocity, the sand transport rate is also affected by the amplitude and period of wind velocity variations. We then propose an ‘equivalent’ steady aeolian sand transport process as a substitute for the actual unsteady transport process. In terms of wind velocity amplitude and period variations, an equivalent wind friction velocity factor u_*' is defined to capture differences caused by wind velocity variations with the same time-averaged wind velocity and friction velocity. Finally, a unified equation for aeolian sand transport is derived, demonstrating applicability for both steady and unsteady flow conditions. The results of this study contribute to a deeper understanding of aeolian sand transport under unsteady flow.