Desert Sand Movement

Velocity of a Saltating Cloud

Ping Yang, Zhibao Dong, Guangqiang Qian, Wanyin Luo, Hongtao Wang

Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou

Velocity of saltating particles is an important parameter in studying the Aeolian sand movement. PIV was used to measure the variation with height of the mean particle velocity of a saltating cloud over a loose sand surface in a wind tunnel. Microvec system with 2 megapixel camera and 200mJ laser was used.

System Setup:

Image Pair:

Velocity field obtained from image pair


Velocity field obtained over 400 image pairs