Numerical modelling of aeolian erosion over a surface with non-uniformly distributed roughness elements

Auteur(s) et Affiliation(s)



Description :
The AA. focused on the analysis of the mean wall friction velocity on a surface including roughness elements exposed to a turbulent boundary layer. These roughness elements represent non-erodible particles over an erodible surface of an agglomeration of granular material on industrial sites. The present simulations deal with non-uniform distributions of particles with a random sampling of diameters, heights, positions and arrangements. The evolution (relative to geometrical parameters of the roughness elements) of the friction velocity for several non-uniform distributions of roughness elements was analysed by the equation proposed in the literature and compared to the results obtained with the numerical simulations. This comparison showed very good agreement. Thus, the formulation developed for uniform particles was found also to be valid for a larger spectrum of particles noted on industrial sites. This work aims also to investigate the fluid mechanics over several roughness particles.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2014, vol. 39, n°. 2, p. 156-166, nombre de pages : 11, Références bibliographiques : 1 p.

Date :
2014

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