Investigation of three-dimensional wind flow behaviour over coastal dune morphology under offshore winds using computational fluid dynamics (CFD) and ultrasonic anemometry

Auteur(s) et Affiliation(s)

JACKSON, D.W.T.

Centre for Coastal and Marine Research, School of Environmental Sciences, Univ. of Ulster, Coleraine, Royaume-Uni

BEYERS, J.H.M.

Rowan Williams Davies and Irwin, Ontario, Guelph, Canada

LYNCH, K.

Dep. of Geography, National Univ., Galway, Irlande

COOPER, J.A.G.

Centre for Coastal and Marine Research, School of Environmental Sciences, Univ. of Ulster, Coleraine, Royaume-Uni

BAAS, A.C.W.

Dep. of geography, King's College, London, Royaume-Uni

DELGADO-FERNANDEZ, I.

Centre for Coastal and Marine Research, School of Environmental Sciences, Univ. of Ulster, Coleraine, Royaume-Uni

Description :
The behaviour of offshore-directed winds over coastal dune and beach morphology was examined using a combination of modelling (3-D computational fluid dynamics (CFD)) and field measurement. Both model simulations and field measurements showed reversal of offshore flows at the back beach and creation of an onshore sediment transport potential. Measured and simulated wind flow are presented and discussed. The CFD simulations offer new insights into the flow mechanics associated with offshore winds and how the terrain steering of wind flow impacts on the geomorphological behaviour of the dune system. Simulation of 3-D wind flows over complex terrain such as dune systems, presents a valuable new tool for geomorphological research, as it enables new insights into the relationship between the wind field and the underlying topography.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 8, p. 1113-1124, nombre de pages : 12, Références bibliographiques : 1 p.

Date :
2011

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

Langue :
Anglais