Aeolian processes across transverse dunes. I : modelling the air flow

Auteurs :
VAN BOXEL, J.H.
ARENS, S.M.
VAN DIJK, P.M.

Description :
This paper discusses a two-dimensional second-order closure model simulating air flow and turbulence across transverse dunes. Input parameters are upwind wind speed, topography of the dune ridge and surface roughness distribution over the ridge. The most important output is the distribution of the friction velocity over the surface. The simulated wind speeds resemble patterns observed during field experiments. In order to obtain realistic predictions of friction velocity it was essential to include equations for the turbulent variables in the model. In these equations streamline curvature is an important parameter.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1999, vol. 24, n°. 3, p. 255-270, Collation : Illustration, Références bibliographiques : 50 ref.

Date :
1999

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