title: Charge-to-mass ratio of saltating particles in wind-blown sand.
abstract: The electrification of sand particles plays an important role in aeolian events. In this paper, the charge-to-mass ratio vertical profiles of saltating particles in wind-blown sand were measured by a field experiments. By combining the results of field measurements with our previous wind-tunnel measurements, we discussed the factors affecting the charge-to-mass ratio of saltating particles. It reveals that the magnitude of the charge-to-mass ratio increases exponentially with height above the surface. In addition, the charge polarity of saltating particles depends on the relative size between saltating and creeping particles, and the magnitude of charge-to-mass ratio is determined by wind velocity and the relative size difference ratio between saltating and creeping particles.
authors.affiliation: 1] Key Laboratory of Mechanics on Western Disaster and Environment, Lanzhou University, Lanzhou, 730000, China [2] Department of Mechanics, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Tian-Li
authors.initials: TL
authors.lastname: Bo
authors.affiliation: 1] Key Laboratory of Mechanics on Western Disaster and Environment, Lanzhou University, Lanzhou, 730000, China [2] Department of Mechanics, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Huan
authors.initials: H
authors.lastname: Zhang
authors.affiliation: 1] Key Laboratory of Mechanics on Western Disaster and Environment, Lanzhou University, Lanzhou, 730000, China [2] Department of Mechanics, Lanzhou University, Lanzhou, 730000, China [3] School of Electronical and Machanical Engineering, Xidian University, Xi'an, 710071, China.
authors.forename: Xiao-Jing
authors.initials: XJ
authors.lastname: Zheng