论文名称： Experimental investigation of particle velocity distributions in windblown sand movement
作者： Kang LQ， Guo LJ， Liu DY
来源出版物： Science in China Series G-Physics Mechanics And Astronomy/Science in China: Physics， Mechanics And Astronomy/SCIENCE CHINA Physics，Mechanics & Astronomy(Science in China Series G)
年卷期页： 2008,51(8):986-1000
收录类型： SCI:327TM;WOS:000257751400006和EI
论文简介： With the PDPA(Phase Doppler Particle Analyzer) measurement technology,the probability distributions of particle impact and lift-off velocities on bed surface and the particle velocity distributions at different heights are detected in a wind tunnel. The results show that the probability distribution of impact and lift-off velocities of sand grains can be expressed by a log-normal function,and that of impact and lift-off angles complies with an exponential function. The mean impact angle is between 28° and 39°,and the mean lift-off angle ranges from 30° to 44°. The mean lift-off velocity is 0.81-0.9 times the mean impact velocity. The proportion of backward-impacting particles is 0.05-0.11,and that of backward-entrained particles ranges from 0.04 to 0.13. The probability distribution of particle horizontal velocity at 4 mm height is positive skew,the horizontal velocity of particles at 20 mm height varies widely,and the variation of the particle horizontal velocity at 80 mm height is less than that at 20 mm height. The probability distribution of particle vertical velocity at different heights can be described as a normal function.
原文链接： Experimental investigation of particle velocity distributions in windblown sand movement