Vertical dispersion of dust particles in a turbulent boundary layer

Auteur(s) et Affiliation(s)

WANG, H.T.

Key Laboratory of Mechanics on Western Disaster and Environment. The Ministry of Education and Dept. of Mechanics, Lanzhou Univ., Gansu, Chine

ZHOU, Y.H.

Key Laboratory of Mechanics on Western Disaster and Environment. The Ministry of Education and Dept. of Mechanics, Lanzhou Univ., Gansu, Chine

DONG, Z.B.

Key Laboratory of Desert and Desertification, CAREERI, CAS Lanzhou, Gansu, Chine

AYRAULT, M.

Lab. de Mécanique des Fluides et d'Acoustique, UMR CNRS 5509, Ecully, France

Description :
The flow of glass dust particles in air was investigated experimentally over a flat bed in a wind tunnel. Particle concentrations were measured by light scattering diffusion (LSD) and digital image processing. It was verified that saltation is the main mechanism for ejection of dust particles. Vertical mean dust concentrations for pure dust and 2 mixtures of dust and saltating glass particles were determined and analysed. Presentation and discussion of the results.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 8, p. 1210-1221, nombre de pages : 12, Références bibliographiques : 1 p.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais